I Have Extreme Anxiety At Tacks And Panic Attacks I

I have extreme anxiety at tacks and panic attacks I have had them since my twenties I am now 66. I was on Valium for them and it was great. Then new doctor took me off put me on celesta I went from 128 PDFs to 186 pounds. I am now depressed . He is changing me to Wellbutrin on my suggestion cause it don't cause weight gain but will it stop panic attacks. Won't put me back on any diazepam so which do work. Will Wellbutrin work?