Hi AMarie, I wanted to welcome you to Healing Well forum. I hope that you are able to find the kind of answers and support that you seek here. We have some great people always willing to help and share experiances.
I have never been on Cymbalta so I cant really help much here. However, if you google "cymbalta and fatigue" you can come up with several studies done on this regarding this medication. It seems that the fatigue factor in patients goes up with the higher doses. As also is insomnia. I found it pretty interesting.