What the heck is wrong with my body?

Sweetie, I hate to break it to you but you can get pregnant from Pre-C*m. If he rubbed his naked penis on your vagina, there are plenty of sperm in his pre-ejaculate (pre-***) to swim up and impregnate you. It is a slim chance, but nonetheless it still exists. That said, you wouldn't be having pregnancy symptoms this soon. If you are having these issues, you may have a vaginal or bladder infection which can happen to females at any time in their lives (not only from sexual activity). You should definitely consult with a doctor as soon as possible for the proper treatment (and a blood test if you haven't gotten your period yet). I hope all turns out well for you and that in the future you make him wear condoms anytime you get intimate with him. Take care.