"condom came off. took plan b about 48hrs later. was super stressed. about a day before i was supposed to get my period, started having cramps, dizziness and  breast tenderness. long story short my period was a day late but i got it none the less. it&#039;s terrible when you&#039;re so stressed out and thinking you&#039;re pregnant. the pill does work. my cramps are terrible though. i felt the side effects 6-7 days after taking the pill as well."