Yes, my symptoms cycle very similar to yours by the sound of it. It gets very bad for awhile every few years also....like a cycle on steroids. Stress is probably the culprit I imagine but most of the time I handle stress well so I just don't understand why sometimes I switch like I do. Someone recently was trying to tell me it's because I'm special in a good way. They obviously don't get it at all.....this stuff isn't good, it's absolutely horrifying. I wish I could figure out for certain WHY it happens so I could put a lasting stop to it all.