So, I had sex in December... I take Plan b's pills 30 - 40 minutes after having sex. I got my period in February (2 months later). I had sex again in March but with protection. Today is April and I DON'T HAVE MY PERIOD!!!!!!! I took the test and was NEGATIVE... I'm really scare. I know that my hormones are f*** up. What I have to do to change that? ASAP