I was only on birth control for a couple months. Hadn't ever been on it before so didn't really know what to expect. My doctor told me it may give me some symptoms of pregnancy the first month but more than likely the symptoms would go away after the first initial month. From the very first week being on the pill I felt nauseated every day. Food tastes different and I wasn't able to eat a full meal. Or even a half meal. Lost like 10 pounds.