Period?

I haven’t gotten my period since my birth control a while back. It’s not effective anymore but exactly one week after unprotected sex I had brown stringy discharge. Nothing heavy except two times I wiped and it was normal blood but not a crime scene if you know what I mean. Today is day five of it. I don’t need to wear tampons or anything since it only happens when I use the bathroom. Not like a regular period considering how bad they used to be. And the cramps are mild. Any help? I will be taking a test here soon. Any opinions will help. Just want to know if this is a sign :)