I suggest you find something to occupy your mind with. You are grossly over-analyzing this minor event. You do not need another CT Scan. Each CT Scan is like 200 to 1000 single x-rays. If you can play on your phone, you have very minor symptoms.

There are many much newer and better anti-anxiety meds than Prozac. You could ask about trying something else.

I think you would do well to seek some therapy for your hypochondria and anxiety. You could benefit from CBT or other similar skills sets.