Hi whyme, sorry that the blogging portion of our site is down, but I'm glad you're still hanging on with us
I know that heart-racing trembling feeling. I used to feel that way when I woke up in the mornings. I finally attributed it to my coming down from my meds because as soon as I took them, I'd feel better within 5 minutes. I also had similar episodes when I was experiencing vertigo. A sort of disorienting, anxious feeling where I needed to sit and settle myself before standing.
Now that I've been off of meds, I have none of those experiences, thank heavens. Hang in there, anxiety manifests itself in so many ways at any given moment. Most often it goes away as quickly as it came all by itself when we learn what it is, when it comes and how to manage the effects . . . hugs