Can Intake Of Cymbalta Cause Sleeplessness?

I ve been on Cymbalta for several years. In the last several months, my sleep has been bad. I have no difficulty falling asleep, but my most recent sleep studies both showed that in 6 1/2 hours of sleep, I had over 2800 limb movements or twitches. While I have no recollection of it, I woke up briefly 88 times, never reached level 3 sleep, and had roughly 30 minutes of REM sleep. I wear a CPAP and had only four brief apneas. When I wake up in the morning I feel like I ve been in a wrestling match. I never feel rested, no matter how long I sleep. Is there a chance the cymbalta is causing my sleep difficulty. I should say about six months ago my dosage was upped from 60 to 120 mg per day.