I've been irregular since period one, day one. I finally decided to go on the pill to help regulate it and it did but after a year I stopped (couldn't tolerate the side effects). I had unprotected sex 2 months later, took plan B about 1 hour later and 8 days later here comes the first signs of a period but it only lasted 2 days. Im trying to figure out the possibility considering I've only been off the pill 2 months, my sister definitely had a baby in spite of taking the morning after pill and all the side effects of plan B never actually left (headache, fatigue, breast tenderness, etc.) I know the only way to know for sure is to take a test but I'm just trying to wrap my mind around all of this first.

Thank you in advance. Your thoughts are appreciated...

There is no way to guess odds, it does not work like that, the morning after taken that quickly is 95 percent effective, but then it means 5 percent chance, but then if you are one of those, then it is 100 percent, then did the sperm get to an egg, were you fertile at the time

The morning after pill works different for different people, some have worst side effects than others.

You have to be two weeks late, before you test, test with first urine of the morning