The symptoms of numbness, tingling, swallowing difficulty, brain fog, vertigo, weakness of muscles, muscle twitching, jerking, cold extremities and symptoms getting worse in sun are all characteristic features of Multiple sclerosis. Since you have
bone spurs,
osteoarthritis and cervical stenosis, the
symptoms are being aggravated. Please get an MRI of the brain. In fact you may need a series of MRI to diagnose to rule out MS.