So I have been on birth control for like 3 years now, and it always starts on a Thursday and ends on a Monday. I just got back from a trip to Europe and I'm wondering if the flight screwed up my period because it didn't start until Friday and it's Tuesday and my period started back up again (light spotting but still). It also didn't help that I switched from taking birth control at night to the morning, so my hormones may be whacked out?? I'm not sure but I am a little freaked out that my period ended and started again so fast. If someone could reassure me or tell me why that would be great. Thanks!