Bless your heart -- stress and anxiety are awful conditions. I used to have anxiety attacks and I felt like I'd pass out from anxiety attacks. My chest would hurt, my heart would race, and I couldn't breathe!!
I went to my GP, and she put me on a Beta blocker and that helped immensely! It slowed down my heart rate, cause at times it got so fast that she couldn't even count it -- it would go WELL over 200!! On the Beta blocker, it got down to where it was supposed to be -- around 60 or so.
I felt so much better -- no more anxiety attacks. I was on that medicine for a long time, until I decided I didn't need it anymore. After I got off, I didn't have any more attacks. Go figure!
I wish you could get in sooner -- after Thanksgiving is a long time to me. Seems like they could get you in a little sooner.

See if you can get on the cancellation list -- then they'll call you if someone cancels.
Best of luck and let us know what happens. Hugs, Lee