Thats a lot of plan b in a short amount of time...I suggest finding a better form of preventing pregnancy.... plan b isn't meant to be birth control. I highly doubt you're pregnant and I'm guessing all those messed with your cycle..
Plan b pills are really only for emergencies. They completely mess with your body. If you eat them like skittles you’re going to have loads of side effects and missed periods. You’re not pregnant, so don’t stress about it, and once your cycles sort themselves out please look into the many safer and more effective contraceptive options out there x