I was told by a pharmacist that if you take the morning after pill too many times then it'll make you infertile.
Firstly, did you use contraception? Like condoms. The pull out method is not a form of contraception, you can still get pregnant by doing that!
Secondly, stress can mess with your periods. If your worried, then go see a doctor.
1. ...did you use protection? You shouldn't have unprotected sex if you don't want to get pregnant. 2. Your period is probably messed up since you took the pill 2 different times in one week... Please get on some type of birth control if you're not trying to get pregnant because plan B should be used as an emergency contraceptive, definitely not to use twice in 4 days..