[Drew]

Up to 4 x500mg per day I'm fine but go up to 6x500mg and I get the headache from hell that no amount of aspirin/paracetamol/ ibuprofen etc can do anything for. The only thing I think may help is topical progesterone cream, which suggests it is simply due to estrogen overload which needs balancing.

Headaches is not a problem for me but I go with VergeOfDiscovery here the PM leg cramps are a real bitch to deal with. Are you sure it's the PM causing the head ache?