Having sex hurts the frontal wall of my vagina and the entrance burns. This has been going on for a while now and I don't know why. My vagina can't handle sex for long periods. If I have sex I then need a break of a couple days but it still hurts. Why is this and what can I do?

Go to your doctor for a very complete examination. There are many reasons, from infections, to STD and many other medical issues

Could it be that his penis is too big for my body? Or the front, under my belly button, is bruised from being continuously hit too hard?

Could be pregnant.Could have infection , go to the doctor or maybe he is being to rough