Fibromyalgia, Multiple sclerosis or an ear disorder?

Hi all,
I’m hoping somebody will answer me because I’m totally desperate for answers. Ok it started a while ago, like 3 months or more; I started to have anxiety attacks and then it turned into derealisation (the feeling of being detached from reality) I am now taking pristiq for my anxiety and that has seemed to go away but the feeling of derealisation is still there but not quite as bad. What I am really writing this for is about the same time 3 months I have been feeling unsteady/unstable/off balance and an unsteady gait while walking and I tend to sway when i stand still. I have had CT scans, MRI’s, blood works and they’re all appearing normal. I have had widespread pain, aches all over, tingling, twitching, wooziness, numbness, slight weakness, and constant balance problems. Do you think this could be fibromyalgia? I have looked up all the inner ear balance disorders and I don’t match up to any about from having poor balance. I have looked up fibromyalgia and have a lot of the symptoms (most of them) but I don’t have the stiffness in the morning. Please help! What is causing my balance problems (Not dizziness) Please do not get these mixed up<. Do I have MS, Fibromyalgia inner ear disorder…???? Please help! What do you think it is?
Thanks for all your answers, Im not sure if i get stiff in the morning…this may sound dumb but i’m not sure what feeling stiff would feel like? i do wake sometimes feeling sore like i have had a workout the night before but havent. define feeling stiff please?