The reasons for vertigo
1. Vestibular system
pathology (it is located in inner ear
and maintains equilibrium, when affected it can cause vertigo)
2. Cerebro pontine angle tumors
3. Blood related problems- such as recurrent hypoglycemia
Normal MRI is helpful to rule out the presence of any Cerebro pontine angle pathology.
So...it will be better to get your blood sugar levels & blood pressure checked & consult an ENT specialist
for proper physical examination.
There is no need to worry...you will be fine.
Wishing you a good health
Thanks & take care.