Yeah, LC can wreck havoc with hormones.

I have endomitriosis, and my doctor encouraged me to keep my carbs under 20g/day to help with the symptoms.

I have had some problems with breakthrough bleeding and abnormally long periods (even when on birth control) but I also take my pills back to back for three or four months at a time, with only a couple breaks for periods a year, just because they're so horrificly painful for me.

Although it may cause some confusion in the short term, in the long run, it seems to be helping with a whole host of things--it's amazing to learn how many of our problems can be traced to insulin and carbs.