My question is why does my vagina burn a little and feels swollen after he comes inside me?

Ejaculate reflects a lot on what a man eats. He is probably eating something that doesn't agree with your internal chemistry. If you know him well do the process of elimination so he can eliminate this one thing, or two from his diet so you will not have that allergic reaction.

He used to not come inside me before and lately he has been coming inside me since were trying to have a baby. He has been coming inside me for the past 3 to 4 months and nothing has happened as to me getting pregnant. And well the burning sensation and swollen vagina is every time he comes inside me and that has made me not want to have sex with him because of that. I really want to find something to help us with the situation.

Your best bet, creyes, is check with you doctor and tell him it may be an allergic reaction which needs to be dealt with.

Does he eat spicy foods or use tabasco sauce on his food? Does he drink beer? You could be having an allergic reaction to the tabasco sauce or the beer.