My last period was the 3rd week in June. It is now September 16th. I was on the birth control called Generis and had to come off of it the first week of August because I was allergic to it and had a really bad reaction to it called Erythema Multiforme. Which was a total disaster. So while I was still taking the pill I missed one period and now that I am off I've almost missed three. I've taken two tests and they have come back negative. I have had unprotected sex because the birth control was our method. I haven't had any symptoms at all, I haven't even gained a pound. What is going on? Please help!!