Hmmm....

So... I had unprotected sex 3days before my period... Period seemed normal apart from turning brown towards the end (usually stays bright red the whole time)... My cycle is rather irregular tho so IDK when I'm ovulating or when I'm supposed to have my period... It's kinda an estimate every month... What I'm wondering is, could I be pregnant even if I had my period? It's been 10days since I had the unprotected sex... I'm wondering because I have friends that thought they weren't pregnant but were and, well, even tho we aren't exactly TTC I would be so happy. Just want some opinions before i take an hpt in 10 days...