More information is needed like your age, you have high BP or diabetes
, you are on any long term medication, how long are your symptoms, you have any nose symptoms, any deafness
or noises in ear etc to explain the reason for all of your symptoms.
With the information provided by you, I can say that you may be having chronic sinus infection
. This has affected your eustachian tube (tube connecting back of your nose to middle ear) leading to stuffy feeling in ears, imbalance. The same thing can explain if you are getting any noise in ears but not if it is in your head. Your examination is likely to elucidate more about your problems.
So please consult an ENT specialist
He/she may advice C T scan of sinuses.
If sinus infection is confirmed, he may advice antibiotic, nasal decongestants etc.
After that if your imbalance and strange noises in head persist, you may have to consult a neurologist
to rule out any cause for your those symptoms.
Wish you good health.