I had sex a few times now but every time we're done i feel physical and emotional pain. i become sore, tired, my face turns yellow. why is that?

Feelings about sex: I'm not sure why your face would turn yellow unless you also have yellow coloring elsewhere. If so, it could be jaundice and needs medical evaluation. This would not be a temporary finding related to sex alone. If in pain or distressed after sex, you might want to consider your feelings about your partner and/or having sex with him or her. You may not be ready for sex when your partner is.