I don't think your symptoms sound like fibro either. The dragging foot sounds more neurological and could also indicate muscle weakness. Have you been scheduled for an MRI or have had an MRI? I think talking to your PCP regarding this and ask for a referral for a second opinion as well as an MRI (with and without contrast) of your brain and spine (cervical and thoracic).

Also, do you have any back pain at all? A pinched nerve could be the reason for this as well.