I have been on it for 3 months and I have gotten the same thing. It was really heavy in the beginning like I was getting my normal period and then it went to spotting and it's been like that ever since. My understanding from my doctor is that it's normal. He told me that you can get a lot of irregular bleeding for the first 3-6 months and then it should regulate out to either a light period or none at all (for the few lucky folk). My understanding is on birth control you don't release an egg, but I could be wrong, maybe it just is programmed to not stick to the uterus. So I can't really answer that.