Girlish,
Sorry to hear you are having such a rough time right now. In my experience the medication does help with exhaustion; to a degree. I am on Stalevo and Sinemet 3xday. It is not a cure all, as I still experience good days and bad days, but it does help. I know what you mean about the emotional ups and downs. That is a bummer! I have been diagnosed for a little over 1-year now and I still ride the merry-go-round of emotions. I hope that things settle down for you soon, and that you get good advice from your neuro.
Take care! JB