I'm feeling lethargic and on a low mood some times I feel like I'm unable to focus by my eyes too and I'm  having a previous history of anxiety last year during covid year when I had dizzy situation for the first time in my life ... After that I had done certain heart profile tests.. doctor said I had anxiety no thing else..since then I don't feel like in a full mood like I was before. Was that dizziness was result of  anxiety, low mood and depression?? Or it was linked with brain tumor or aneurysm.!? Should I do an Brain MRI ?? Plz suggest .!