Hi ,Welcome to HCM and thank you for the query.
Hope you are doing good.
Well in brain tumor
there are many associated symptoms like edema, vomitting associated with headache,altered state of consciousness,dilatation of pupils,personality or behavioural changedouble vision ,dizzziness.
Let me know your age?
If you are very unsure,why dont you go for imaging and x-ray.
Dizziness may be due to reasons like anorexia,ear infection
,migraine,low bp,low iron content ,low blood sugar
,panic changes,harmonal changes,hyperventilation
I would suggest you for radiological examinations.
Hope i helped you.
Dr Shilpi Gupta