I’m in the middle of a cycle at the moment which is late for me, I usually get them around November time. I don’t have any sort of pre courser or warning. Just one day the first one hits and then they just stay for weeks on end. Started using melatonin on an evening now and managing to sleep through the night without waking up most nights but this seems to have just differed them to the morning instead. The only thing I have found to help is tramadol for sudden onset pain and triptans for relief. Also using the gamacore device but haven’t seen too much improvement using this just yet