i had my period on the 13th of june and on the 15th i was messing around with my bf. however, only the tip of his penis went inside my vagina so i got scared of pre-cum, so i took the pill less than 24 hours later. 5 days later there was alot of brown discharge that turned into blood as if it was my period and it lasted for a couple of days. now i'm 3 days late for my period. should i be worrying? or is that normal? please help! im under alot of stress and cannot handle it!