Ear gradually plugged up, feels numb down neck after a week. Some vertigo. Have a phlemy cough now. Sinuses or cold? What do I do to help clear this?

Sinuses or cold. I think a consult with an Ear, Nose, and Throat specialist would be your first choice. The doctor is very likely to help you and control your symptoms, but it is also likely the doctor will recommend you also see your Primary doctor as soon as possible. Hope all goes well - please keep me informed!