Hi GBSB,
I started taking Cymbalta 30 mg in Sept. My doctor wanted to up my dosage at my 2 week follow-up because I was still having a problem with depression. I also experienced extreme fatigue in the afternoon, sweating (like I was having hot flashes). She increased my dose to 60mg after 1 month. It took 6 weeks to start feeling like myself again and the side effects stopped after 3 weeks. A couple of things you said in your post is the grinding of your teeth and clenching of your jaw. I found myself doing this and am wondering if it is from the Cymbalta. I also have some wild dreams but thought it was from the Ambien. I wake up laughing sometimes because the dreams are completely off the wall!
I have also lost 30 pounds while on it.
Take care and feel better.