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 there are no clues, you have to be followed up by a neurologist
High systolic is generally due to stiffness
of vessel wall / Low diastolic is often due to low rate or vasodilatation. There is circadian rhythm for BP - starts rising from dawn , peaking before noon... See a cardiologist...
Wishing speedy recovery