Thank you for the information,
There are some common causes of such dizziness.The common ones are middle ear inflammation, meniere's disease, migraine related vertigo, acoustic neuroma, orthostatic hypotension, inner ear disorder, certain drugs, anxiety, etc.
As per the symptoms described by you, the chances of dizziness may be due to the side effect of the drug cymbalta and wellbutrin ,etc which you are taking.These drugs acting on CNS may cause dizziness on long term use.The change in drugs may be required if the symptoms are severe.
The other possibility could be the orthostatic hypotension which may also cause such dizziness.The decreased blood supply may cause such symptoms in you.
You should have the relevant investigations done like ct scan brain, blood sugar, blood counts, blood pressure monitroing, 2d echo of heart after consulting your doctor if your symptoms are severe.
Here is the link for more information
side effect of wellbutrin
side effect of cymbalta
causes and treatment of dizziness
Let me know if you have any doubt.