Am I pregnant?

Had unprotected sex for not even 4 minutes. My bf(now ex) keeps lying and saying he cummed,then he didn’t, he shoots blanks, then he don’t. Idk what do beleive. But my period 17 days late and my boobs are tender, got cramps, and kinda peeing a lot. It’s hard to get a test and Ik it’s what I gotta do but does these symptoms sound like pregnancy?! I’m 16 btw and my mom would kill me.💀