So I just got a new boyfriend and we had sex like more than a week ago for the first time and it was fine and felt amazing. He's larger than what I'm used to and so my vagina has been hurting and feeling sore and its been about 4 days and it doesn't hurt to finger but when he goes to stick his penis in it hurts so bad. What could this be? I'm very aroused around him and I'm not dry or anything, idk what it could be.