If you didn't have the spine imaged, you should talk to your doc as MS can show up there too.
Hypothyroidism can certainly be a cause of your symptoms
. Once treated adequately, your symptoms
may improve. Another test that may be helpful is an EMG to see if this a problem of your peripheral nerves. Laboratory workup such as ANA, sed rate, blood count and electrolye profile can also help rule out other potential problems such as lupus and other rheumatological disorders.