im sorry you are having such a bad time. this sounds like it might have some post partum depression attached to it. its probably not normal to worry about dying at every moment all day, you know? we are all afraid of dying, and once in a while the thought passes my mind and im devastated for my son if i were to die. i think every mom thinks about it. but it doesnt consume me to the point where im frightened and thinking about all the details. it would be helpful if you could talk to your doctor about this and see if there are some ways that you can talk to a counselor or just check to see if theres some hormonal imbalance going on. theres nothing shameful about this, you just have to make sure you can take care of you and not have the fear anymore, at least not to this extent.
i highly recommend reading the Bible once in a while. you dont have to read a lot, and the easiest to read is probably matthew mark luke and john. ;) it gives me comfort anyway! :)
www.amazingfacts.org is a good site to get some info if you were interested.
one last thought, even if you are confused, or having a hard time figuring out religion because of science, one thing you can do no matter what is pray. just simply saying something like "God, i know you are there, and im tired of being so afraid! please help take away this fear!" - God is there to relieve our struggles, our fears, our concerns and worries. He doesnt want us to fear. so just take a step out in faith and ask Him to calm your worries. if you ask it He will answer, so even if its not right away, just keep on going.
as far as science goes, it takes just as much faith to believe in a theory that we did not observe and cannot replicate as it does to believe in a God we cant see, but Whos imprint we can see in our children, in every plant and creature and in the very sky. for me, its a lot easier to believe that God made us this place from the biggest star to the smallest molecule than to believe that it all happened by accident. but thats just me. i know this world is full of conflicting information, but remember, even evolution is simply a theory, and we havent been able to replicate, or observe it, so we really dont know.
i once heard someone refer to carbon dating in this way: imagine theres a room with no windows and no doors and inside is a candle burning. now, all of a sudden you cut a hole through the wall and enter the room. you are going to determine how long the candle has been burning, but you have no references on how to do that; you dont know how tall it was to begin with. sooo lets say that there is a slip of paper there saying how tall it was (with carbon dating, theres no "cheat sheet" telling us how long its been happening). so you can estimate, based on the current burn rate, how long the candle has been burning based on how tall it was when it was lit.
but we have forgotten one really important detail! the flame on the candle needs oxygen to burn. as the oxygen burns and less is present in the room, the candle slows down (try putting something over the top of a candle to see what happens when you cut off or limit the oxygen entering the candle). the room was closed up before you entered it. when you came in, the oxygen in the room was increased because you let more air in. so now the candle is actually burning faster than it was before.
point being, when we started paying attention and watching the carbon dating process, we were watching how it currently burns. this is after humans started effecting the planet, the air conditions, the environment conditions, etc. so we really have no way of telling based on current carbon dating information what it was like before we started cutting trees, creating air pollution, planting non-native plants, etc etc etc. its pretty strong faith that can believe in a theory when we have no details on how it began .... just as much faith, in fact, than to believe that God spoke all of creation into existence.
dont get me wrong, science has its value, its very valueable!! we have many answers to many questions about the world around us, and the scientific process is very helpful in allowing us to figure out how things work. however, when the very theory science uses to devalue God cant even be tested by the scientific process.... thats where someone's gotta draw the line. a major part of the scientific process is testing your theory by replicating it. we cant replicate any form of evolution. so its kinda got a hole there....
anyway.
dont discredit science. it does a lot for us, for our world, for our health, for everything. but it doesnt answer everything. it cant explain how every single giraffe has a different pattern. it cant explain how no 2 flowers, animals, people, fingerprint, or dna will ever match another. it cant explain the sparkle in the eye of a child or the trust of a pet to a human. it cant explain the love in our hearts or the urge to do something for someone else. it cant explain emotions. ;)
so if you want to believe in God believe in God, and still love science and explore the world! right now, you might not have all the answers, and you might not be able to figure out how to "match up" science and God, but both are very real, very valid and very interesting subjects. logically, science explains processes in our world, but God explains love and good in our world. i dunno. im talking too much. www.amazingfacts.org is a great resource, and might have some answers for you.
anyway.
good luck , and take care of yourself. talk to your doctor, even your child's doctor. see what they can do for you as well. :) and just keep asking questions, and believe! :)