Will have my first brain MRI scan

In two days ,I had OCD since I was a child ,depression all the time ,mood swings on daily basis.
Recently started to have brain zaps followed by ringing in my ears.
I hope they wont accidentally find something that says tumour.
Last years I checked my adrenal hormones ,DHEAS was always high above the range ,nevet changing ,a young inexperienced endocrinologist told me it might be adrenal cancer ,a type of cancer that kills very fast.Turned out that those were my natural levels.
After this brain scan ,i will stay away from doctors for a long time.