I have been on Seasonal Birth control for the past 5-6 years, and I got.  Period every three month, as I was supposed to. I just recently stopped taking it in late February/Early March due to TTC. I got my period in March, and also in April. I DID NOT get my period in May, and still have yet to get it in June. I've taken numerous pregnancy tests, at home, and also at the Doctors, and I even got a blood test....all came back negative. I am making an appointment with my OBGYN if I don't get AF this month. Does anyone know what it could be? Has anyone ever gone through this?