What could this be ?

Hello everyone, so I’ve been stressed recently. & this month I started spotting brown discharge just when I wipe. It’s 2 weeks till my period and I’m scared. What could this be?? I had unprotected sex April 28th, is it implantation bleeding ?!??? Is it to early for it to be implantation? I was supposed to ovulate may 6-8. I really am confused on how it works. If you guys can give me some input