For the last 3 mths I've had many symptoms. I've had the following, tingling parts of the body, pins and needles, muscle spasms/cramps, heaviness, veritgo, visual floaters, neck and shoulder stifness. All bloodwork and MRIs (brain and cervical spine) were normal, well I was told I have a stiff neck and I'm now going to therapy for that. But for the last month or so I've had difficulty falling asleep.