I'm so glad you found a group to help you. Oh and *pbbbtt* to menstrual cycles! Ever think that God took the punishment of Eve's Daughters just a wee tad too far?
I mentioned it in an earlier response but I feel it bears repeating: Exercise does help. Quiet bit. A good long walk in the sun can help kick some depression like little else can. I know that getting yourself motivated for a walk can be damned hard--speaking from experience-- but maybe that's something you can mention to the group to help you with as well. Good luck to you!