should i be scared?

my bf and i had sex for the first time on monday, (both virgins) and ive been taking BC for two months. ive been very deligent with taking them at the same time. when we did have sex, neither of us finished though bc we had no time to keep going, so he never came in me or at all. but according to my chart i shouldve gotten my period this week and i havent. my period is normally very irregular a d im on birth control to regulate it. my last period was june 28-30th, but two weeks ago i did bleed again, but i wasnt sure if it was my actual period or spotting. should i be scared about anything? what if the BC wasnt working bc the day we had sex i was on the non hormonal pills since those 4 days shouldve beeb my period?