I need help I don't wanna be trapped😞

Okay hey girls, so me and my boyfriend of two years have officially ended things. We last had sex July 29th I know it's gross but I was on the last day of my period and he did pre cum in me. He pulled out but I'm still nervous. I haven't been feeling like myself, I know it's the emotions of a break up I get that. But like on the inside I don't feel too hot. I feel like I have constant cramping and a lot of discharge. I thought I had a uti bit I don't. I wanna know if I'm crazy to wanna take a test. In my head I'm thinking, do I subconsciously wanna be pregnant to keep him? Am I just over reacting? Or am I possibly pregnant?