M.
Ah - I felt the same way with my first. She too had colic and it took us 3 months to figure out how to help her. I was so exhausted and tired from all of the crying. I thought this can't be what motherhood is like!!! It does get better after 3 months!
Here's what we did that helped soooo much:
We used Nutramagin formula. It is hypoallergenic and it cleared up all rashes and colic within 3-4 days. It is expensive but soooo worth it.
I gave up eating and drinking all dairy while nursing because everything you eat can affect the baby.
We used the Playtex Nurser bottles with the bottle liners. (You can buy generic liners from Target or Walmart.) When you put the bag into the bottle, fill with water, then formula. Shake it up, then push all of the air out of the bag 'til the formula squirts out of the bottle. This way, the baby get NO air from their bottle and really helps out their tummies.
Also, we used bottled water or filtered water and left it out on the counter at room temperature. This way, the cold didn't upset my daughter's tummy, but she also didn't expect her bottle to be warm. I don't believe in microwaving as it is unhealthy. I had a bottle warmer, but got tired of waiting 4 min. when my daughter was screaming for a bottle (and didn't want the breast). Once you heat it, you have to make sure it's not too hot and sometimes have to wait several min. before giving it to the baby. Also, some babies get used to having a warm bottle and when you are out and about and they might refuse to drink anything that is not heated. It is so convenient to pack a diaper bag with with 4 or 5 bottles ready to go with room temp water. All you have to do at that point is add your powder and shake and you have no worries whether the temp is too hot or too cold. (They even sell formula dispensers that aren't bulky so you don't have to pack the whole can and make a bottle easily wherever you are)
I hope some of that helps for you - def talk to your pediatrician too! (my ped and my best friend helped to keep me sane!)
Here is a link to tell you about the bottles:
http://www.playtexbaby.com/Products/Bottles/DropIns.aspx