I'm 18 and I had sex with my new bf 4 weeks ago. We didn't use a condom (ya I know it was stupid) but I am good at taking my birth control. I should have gotten my period 3 days ago so I thought about masterbating to try and make my period come faster so we wouldn't have to worry about me being pregnant. Anyways I started bleeding, which I normally don't from masterbating. I am wondering how I can tell if this is just normal blood compared to period blood.