I suffer too. Normally the week before mine, I'll get small things like my speech will go off, I'll feel extra tired in my legs, and I'll notice my blood sugar constantly stays in the low end (like my muscles are trying to get all the energy it can and it drains me), and every so often I will tremble in my hands.

*This* month however, it seems to have started early so now I am at about 2 weeks prior to mine, and I have been feeling like total crap. Complete back pain, weak or heavy feeling in the legs and arms, my speech isn't as good as it once was. Part of it is probably still me catching up from the holidays (I work retail, you can imagine how fun that is!). It's incredibly frustrating to know that for 1-2 weeks every month I will feel horrible. Where's the fun in that