Pregnant and going crazy :-\?

Hi, I have anxiety/ptsd complete with panic attacks. I used to take a benzodiazapine-based med for this pre-pregnancy... for nearly 2 years. It was the only thing that helped. I was doing OK the first trimester but now I'm at about 25 weeks and have been steadily getting more anxiety and panic attacks (esp. when driving, which is not good). I spent the last trimester pretty much cooped up in the house and now I find myself getting panicked easier and I've been pretty -blah- lately, which I'm not usually. I'm usually pretty plucky. I just can't stand being in the house!! Which brings me to... if you were on anxiety meds pre-preggo, what if anything helped as the preg. progressed? I hate bringing this up with my doctor, I just moved cross-country and have a new one I'm not used to and it's kind of embarring I guess. :-\