(((hugs))) the very fact that you don't have "specialized" things that are worrying you al the time, but are anxious in general kind of shows me you probably have the right dx? That you are posting a worrying message about whether even the dx is right... fits too? : ) Your worrying is about things in general and you can't nail it down to the same things all the time... GAD.

The nightmares could be from medication.. but dreams are often the way the brain tries to reconcile events, and it also uses them to refile (file correctly) what might have been misfiled in the past. Nightmares can increase when you are sorting through tough issues, especially in therapy.

You might ask the withdrawal question in the drug forum, as Cam can give you a good response. I do know that some medicines can have residual effects for a month or 6 weeks...