"i took this pill 13 hrs after unprotected sex on nov 1, 2 days after my period ended. he pulled out, but took it just in case. 8 days later i had a very short period. for weeks after that, i had what felt like little cramps that came and went, but never a period. i was moody, hormonal, and stressed because i worried that what i had earlier was just heavy implantation bleeding. i took 4 at home pregnancy tests and they were all negative, went to the doc and had a test done - negative also. 7 stressful weeks later, my 2nd period came, with a vengeance. i will be getting on birth control as well as always using condoms! the stress and the crazy effects aren&#039;t something i want to go thru again! but, not pregnant!!!"