Me and my gf decided that we should have sex , so we did, LAST WEDNESDAY, then we realized the condom had broke after we finished, I didn't pull out because I didn't know what had happened to the condom. So after that, the following THURSDAY we went to the store and bought a plan b pill/tablet thing, she took it. A couple days later like around two days later she said her stomach was hurting a lot , which we were thinking were some of the side effects. Now it's been seven days, it's Wednesday today and she has not had her period yet which is worrying us a lot because we're still in high school and we can't afford to have a child, trust us we've learned our lesson, but my question is , should we be worried that her period ha not started, by the way her period doesn't have a pattern or anything so she doesn't know if she's missed it or if it's late , but I was just trying to get some help ASAP, - thank you