Thank you all! Wow, I am really sorry all of you have been going through this, although I have to admit It does help to know I'm not alone.
Jane, I am definitely keeping the medication option open. I will see if anything else helps first, and then seek a psychiatrist if I feel like I still am overwhelmed. That is what happened when I had depression in college. I put off taking an antidepressant until I knew I had exhausted all other options. I eventually went on generic Prozac, and it helped get the ball rolling out of the depths.
SNAFU, I am right there with you.

I think part of what's exacerbating my anxiety is the obnoxiously cold weather, combined with some external factors (job insecurity, family issues) that just make everything feel very fragile and tentative. I hope you feel better soon!
Carlos, I have been meaning to learn how to meditate for a while. What kind of meditation are you practicing? There is an Insight Meditation group that meets near me that I'm looking into.
trentsketch, wow that sounds really scary.

I have actually had to stop going to the movies when I'm feeling really anxious. I get hypersensitive to them and feel sort of assaulted emotionally, especially with heavier films. I will see if walking helps. I fell out of going to the gym before the holidays, and never managed to get back into it. Hopefully, it will help.