Thank you for your query and Welcome to HCM community.
You haven't mentioned your age which is an important consideration in making diagnosis of cause of Dizziness
First, i want to tell you "Dizziness" during turning head or any activity the change pressure in the ear like coughing/Sneezing
is actually vertigo. Vertigo usually occurs in problems of internal ear, the nerve that connect it with brain and the "vestibular" portion of brain. So, problem anywhere from your ear to brain can cause it.
Vertigo is never a permanent continuous condition, whereas some other causes of dizziness can be continuous or persistent, the most common of which in younger patient is various psychiatric disorders like Anxiety or Depression
you mentioned. "XET" is an anti-depressant drug and this suggest, you may have got "Depression".
But, for organic evaluation you should consult with a Neurologist
and or ENT specialist
Hope, this helps.