Confused? Help😩

Ok so like I’m curious..? I had sex on the 24th feb (unprotected but pulled out Ik still not 100%) and I’ve bled since then sort of like my period because it was around the time I was due to start it butttt it only lasted 2 days when it usually lasts at least 5 and it was all old/brown blood and like no fresh blood. Could there still be a chance of pregnancy?🤷🏻‍♀️🤷🏻‍♀️

P.s please be nice Ik it was stupid to have unprotected sex but it’s in the past now and I can’t change it😕 if I could I would