I have been on Cymbalta for about 2 1/2 months. The first night I some really crazy dreams. Thank Goodness it was only the night. Then I day 2 days of nausea, followed by 2 days of eating everything in sight. After that my appetite returned to normal. I also experieced the dry mouth but that has subsided too. Now there are no side effects that I am experiencing. It has helped with the pain and my mood is much better. It is working great for me.
Be thankful that you are not experiencing any side effects and lets hope it makes you feel better. We have to remember we are all very different and react differently to meds.
I hope the best for you!