So let me give you a little background. I’ve always been irregular, would always get my period only like 4 times a year . Then I got on birth control to regulate my periods , which it did . I got my period every month. I was on it for 2 years . I got off it back in April ( it’s been 6 months).I had unprotected sex in July. I saw him finish out of me but still I was scared about it because it only takes one sperm to get you pregnant lol. So yes . I was freaking out, and although he said I didn’t need it, I made him buy me plan b within 10 hours of unprotected sex. My period came a few days later when it was suppose to and it lasted 7 days . Which is normal for me .Then In August I got my period , it was 2 days late but I still got it .Normally my periods are strong in the beginning of the cycle then end up becoming light, and last 7 days, but in August it was light all 3 days then on the 4th day it was heavy. Then the 5th day it was completely gone .My periods normally last 7 days and are pretty heavy so Idk if it was just plan b messing it up. In Sep. my period was suppose to come on the 24th. I was stressing out a lot tho. And my right nipple was sore for days ! Which is very unusual for me. We’re now in Oct. and still no period . I’m about a month late on my period so far .I’m 19 and a college student. I’ve been stressing so much with work ,school, bills and the thought I could be pregnant. I’m just hoping it’s the plan b and stress that has delayed my period.help?