Oh, the generic is mirtazapine.
Try Remeron. It has anti-histamine effects. It will help you sleep too. My doc said it is a the "pscychiatrist's secrect drug". It's old and has a good reputation. You take it at night because it is sedating.
Because wellbutrin is a pure anti-depressant, it is stimulating, and isn't usually used when anxiety is a big issue. That may be the problem. Can't tell you which ssri to take, they all affect people differently, so it's trial and error. They really do one of two things: pick the one that's still on patent because that's the one they get free stuff for selling, or pick one out of a hat and see what happens.