The "plugged" feeling and pulsations could very well be related to eustacian tube dysfunction. However, an ent doctor should make sure you do not have anything more serious happening by completing a thorough physical examination. Your dizziness can be from any number of things from inner ear infections to positional vertigo to excess fluid in the inner ear to excess pressure to leakage of inner ear fluid. Seeing a physician to review your history and correlate exam findings is needed to arrive at a diagnosis. Best wishes.