Does anyone worry that your symptoms of fibro could really be something more serious? I worry about PD alot and it is really scaring me. Any advice? I have a lot of muscle twitching in hands and all over body. I have a lot of pain in lower back, sometimes arms and legs and heals of feet. I am tired all the freaking time, a walking zombie mostly. I used to get a lot of numbing but that rarely happens anymore.