Can tingling in feet, thighs, face, shoulders, back, hands be caused by spine/muscle problems? Dr. ruled out everything else. I am a new mom.

New mom. This is unlikely to be a neurological problem. However you are a new mom and you live in Canada. Try some extra calcium and magnesium. Also take some extra vitamin D3.
No. No spinal disorder would affect all those symptoms. MS might, but most commonly it is anxiery.