very Scared

Hi guys so I’m 16 and I just lost my virginity for the first time on Wednesday. In the middle of it the guy took the condom off . I watched him You know .... so he didn’t do it inside me ,but I’m worried about Pre-Sperm . I’ve been really moody , headaches and nausea, and my boobs hurt at the bottom . Idk if I’m over reacting but I’m just really scared so please be kind :)