Sex & period

So today was basically my last day on my period. I’ve just started birth control so, my period has been kinda weird. Although before I started my birth control , 2 weeks before I was getting cramps and I was nauseous. Anyway, I had sex with my boyfriend and to my surprise no blood was on the condom🤷🏽‍♀️ but after I peed and wiped , it was this odd brown color and kind of looked like implantation blood 🤔 any comments ?