My boyfriend's condom broke and I took Plan B about 3 hours after. It was the first day of my period and even though people say it's difiicult to get pregnant while on your period I took it anyway. Well I then precided to have my period for about a week and a half. Now I'm supposed to get my period again and I'm 3 days late. Is this normal?
I also have chlamydia, but I don't think it affects your period.
Your period being early or late and heavier or lighter than normal is a COMMON side effect of taking Plan B.
You took it in time and very likely didn't even need it. It is very unlikely you are pregnant.
When your next period will come we can't predict.
You can always take a home test.