ha, I thought by "bonking" you meant s.e.x.

The only thing I can suggest is perhaps look into natural progesterone cream? I usually get horribly emotional and/or psycho with PMS and nasty night sweats in and around my period. But since I started using a natural progesterone cream (wild yam), I've noticed a marked reduction in my PMS symptoms.

Not sure if that would apply to your situation, though.