I’ve been on the conceptive implant for not even a year. Before the implant I never had really had or heavy periods and even after the implant I had a constant light period until I was put onto the pill by a doctor. I’ve finished the pill and haven’t had a period in a good few months with no problems. However I’ve suddenly began feeling extremely ill. I put it off as a cold but I started getting very bad cramps and suddenly was bleeding heavily with black large clots. What is happening?