So first of all, I have read that the keto diet will mess with your menstrual cycle at the beginning. But first of all I have endometriosis, and I currently have the arm implant for birth control. With the arm implant, I haven't had to deal with shark week in over a year, it was great. Then a week after starting keto, I had such a terrible painful period, that I thought I was dying. Realized it was because of keto, and managed to make it through. Then I was off shark week for only 5 days, before I started bleeding again. The cramps are bad, but tolerable this time, but I just think it's odd, that I would start bleeding again 5 days after finishing shark week. Anyone else have this issue??