What's wrong with me??

Pali
I just had sex with my boyfriend at the view and everything was okay until an hour later I started to be depress n I start to cry from a nowhere. N he tried to calm me Down n hug me n I got really angry n got out of the car n start walking away! N he grab me n put me back in the car n we talked n I couldn't even say a word to him. 
What's wrong with me?