I Have Been Taking Lyrica For Fibromyalgia A Couple Months--100

I have been taking lyrica for fibromyalgia a couple months--100 mg ea am and pm. I have noticed a very disturbing gain in weight as well as fluid retention. At times I feel that lyrica is helping, but I sleep an unusual amount of time. Right now I feel like I'm on a slow burn (arms and legs). I do feel relief from the pain at times, but it doesn't last long. Should I stop the Lyrica? I tried Cymbalta as well, but if it helped, it was short-lived. I have gained 20 lbs or more and just can't let this go on, yet I need relief from the pain of fibromyalgia.