7 years ago jenjen_winn

I am prescribed to Loestrin 24fe, a birth control that regulates my period. I took plan B one weekend after a small scare (while still on my regular birth control). I had sex a week after that (while still on my regular birth control but without the plan B this time). My question is, does plan B affect my menstrual cycle that is regulated by my birth control? I am on day 2 of my placebo pill and have yet to start my period so I am quite concerned. Thanks!


It's likely. It's a much larger dose than your normal birth control, so it may well overrule that and mess things up. If you take your birth control at the same time every day and never skip a pill, there is no need to take Plan B, because you'll be protected.