I hear popping when i swallow, tired alot. heavy eyes and head. and a strange fuzzy sound in my ears. is it serious?

Rhinosinus: Most likely is mild inflammation of the nasal and sinuses cavities with associated middle ear and eustachian tube dysfunction. Try otc antihistamines decongestants. If no improvement you might need to see a Dr for possible infection.

Hard to tell: The types of symptoms described vaguely correlate with upper respiratory congestion or sinus congestion. Typically, a decent evaluation by a primary care provider can start the process of evaluating and treating your condition to see if there are any signs of a more serious condition present.