Can't stop eating..

So I've never had weight problems, I actually would be better off gaining weight tbh so over eating wouldn't effect my weight really and if anything maybe help me gain.. Although I have been eating nonstop.. I have this problem where I can't eat for a few days at a time, like food makes me sick for those few days up to a week sometimes and then there are times like these where I can eat and eat and eat and not get full. This has been going on for nearly two weeks now like my body is craving protein or just a ton of food and I have to like force myself to stop eating. I don't think I'm pregnant or anything buuut could that be a sign that I am?? Since I did have unprotected sex with my bf twice a few days ago idk if I would even be having symptoms this early... What do y'all think??