Sorry you're feeling so crummy.
There are many homeopathic remedies you can try, one being Cimicifuga, but with homeopathics your particular symptom picture would dictate which remedy suits you best. Try a practicioner or perhaps some 'net research to narrow it down. Also, 100mg daily of additional B1 (thiamine) can help, as can B6 (though no more than 100mg daily total of that). A calc/mag supplement is important! Crampbark, dong quai and blue cohosh are some other popular herbal remedies. Otherwise, heat, light exercise, and yoga (like child's pose, or any relaxation pose) can help, too.