H.W.
Can you be more specific about 'he fights me a lot'?
I know you are a new mom-- here's the thing: babies don't really have any idea of what the heck is going on at this age or what they are doing. That is an idea you are projecting on him, but please believe me, he is not capable of consciously thinking "ah! Got her!"
My guess is that you really need a break. That's okay to need a break. Babies are demanding. They DO want to be on us all of the time.
Please try to also remember-- and this is brain science, mind you-- the baby is born with a brain which is only barely developed. Thus, they are often very reactionary, and that is to be expected. Their higher brain (reasoning, logic, etc) is nowhere near developed at this age. He doesn't really even have any concept of object permanence (understanding that when you leave, you come back, when something disappears from view, it isn't gone forever). The other, very important piece of this to keep in mind is that the lower brain processes ALL senses of upset or loss or 'I can't get what I want' in the part of the brain that registers pain. Thus, frustration= pain reaction. He's also at a stage where separation anxiety can rear its ugly head big time.
All this to say, this is common. Laudie, I was a baby nanny for years and cared for some babies who would cry and cry and cry until they fell asleep. It was just their discomfort ~who knows? Separation from mom? Gas? Just mad that this is so much harder on the outside than it was in the womb where there were no unmet needs and they were always snuggled up tight. Also keep in mind that your child has Less time out than they did 'in'.
Other things to watch for are teeth emerging and any attempts to sit up, too. I'm not suggesting you stick him in a Bumbo chair-- he's going to need learn how to do whatever he's driven to do on his own.
Do look up 'wonder weeks' online-- when babies are learning new things, they tend to get cranky, tired, clingy and loud. And check gums for emerging teeth. Or have the doctor check at the next well-check and be sure to ask about appropriate Tylenol or other pain medication dosages.
Good luck, and remember-- don't take it personally. He's not trying to do battle with you, okay? He's got the whole world to deal with.