) and other anxiety-related symptoms, I wouldn't think that you have a brain tumor of
any sort, given the initial presentation of
symptoms, though I'm surprised your doctor didn't just order an MRI--do you know why they didn't? Pressure behind the eye, coupled with a few other symptoms you told them you were experiencing, would certainly justify an MRI of your head.
If anything, the beta-blocker you are on is probably causing some of your additional symptoms--you might want to look into this.