This is an old thread, LTH went on to try some ADs I think and then I lost track of her, I'd love to know how she is getting on.
I am still murderous but not quite as bad as before thanks to taking a high calcium/magnesium, b6 supplement, cutting out the crap and MEGA exercising.
Like overlord cyb I am around the 40 mark.
Howard, I see you resurrected this thread, I think it's admirable you want to understand and do more. Give yourself a brownie point for that.
The best approach is to be all forgiving during that one week of hell, do not provide solutions, do not provide hugs, do not provide anything. Simply listen, nod and agree. Also keep a note of when it is likely to happen so you can say to yourself (but NOT to her!) aha it's almost time for her period.
Can you persuade your g/f to try one of the vit supplements? Does she exercise? Yoga is also a great help.