Paronoid again

This was the first time that scared me, now whats scaring me Is that I had u protected sex with my bf last Friday and I keep on thinking I’m Pregnant because I’m spotting.... at least I think. Sometimes I have this dark brown looking discharge and sometimes when I do wipe it is red (maybe blood). One of my friends told me the black and red might just be my vagina cleaning it’s self. But I’m not sure. I was going to get an ealry result pregnancy test just to ease my mind to tell me I’m not. And, I apologize to everyone reading this because I’m like the most paronoid person out here 🤦🏻‍♀️