long story short, my bf and i had sex and the condom broke, took plan b within 24 hours, started birth control 2-3 days after, (because i was on my last few days of my period when we had sex) and i was suppose to get my period tomorrow and i had spotting yesterday. i took two at home pregnancy tests, both turned out negative. period, pregnancy, or just affects from birth control??

NOTE: I STARTED birth control, i wasn’t taking regularly beforehand.