"listen, i had sex on 01/08/16 and the condom came off when he withdrew. it was every where. i took plan b about 13 hours later. i got every side effect ever. nausea, bloating, very tired, headache, lower back pain and cramps!!! lots of cramps!!! i will not tell you to relax because i couldn&#039;t relax at all for two weeks. i had no sign of a period at all for over a week and a half. i woke up everyday freaking out! yesterday i got spotting and then my mind raced and i googled everything! today af came. 12 days after plan b and 1 week late on period. it absolutely messes with your hormones and you will be hyper sensitive to every side effect you get and i know you will think your pregnant as soon as you feel a sign but it is the hormones."