Welcome to Health Care Magic
The body's balancing mechanism is in the inner ear
An ENT (Ear Nose Throat) specialist is the one to see - especially in the presence of tinnitus
They have special tests to confirm or exclude the contribution of the ear - which probably is the case with you.
If it is from getting up from bed, it may be from postural hypo-tension.. Did you check your BP?
It can be from anaemia
– what is your haemoglobin?
Has an ECG been done? Irregular rhythm can cause it – you need an event monitor to document...
Wishing speedy recovery