PERIOD OR PREGANT????

okay, so my boyfriend and I had sex on the 21st this month. my period ended the 19th.  after sex we noticed a hole in the condom but we think it was from after ( not completely sure still ) anyways, he pulled out anyway - because I wanted to be safe . I don't know if any precum made it in and I hope not because apparently sometimes it has sperm. so, we got the morning after pill about 40 minutes after sex. just yesterday I started to bleed, sort of like spotting... it's very noticeable when I wipe and my boyfriend tried to finger me but he got blood on his fingers. I'm concerned as some people say this could be 'implantation' or just old blood from the period or even just damage because of the intercourse or maybe even him fingering me . the moral is. I don't want to be pregnant. what are the chances of me being pregnant if we pulled out and got the morning after pill? 
PLEASE HELP IM VERY ANXIOUS