"my period was on may 3rd-7th. my bf and i had intercourse on may 11th. took the pill on may 13. started bleeding may 18. lasted for 4-5 days was light then turned really heavy! i felt extremely nauseous, bloated, headaches, tired, eating a lot and breast soreness from the pill. i thought i was pregnant. i didn&#039;t even know if the may 18 was a period or not. finally today june 20 i&#039;m bleeding!!! so i guess may 18 was my new period."