Just a bit of a strange question really. I have been on the pre op diet for nearly three weeks now and I think it may be affecting my periods. I am on the low carb diet and have lost about 15 pounds which I am really chuffed about. The problem is that I have been bleeding for most of the time I have been on the diet. I rarely have a period as I take the mini pill and for it to last this lost is a real one off. Just wondering if anyone else has had the same thing or do you think its a coincidence? I would of thought that rapid weight loss would stop your period if anything.