I have an excellent coping strategy, but it costs money and right now I do not have it. Basically, hot temperatures. Sauna, steam baths, hot salt rooms in Korean spas - they work absolute wonders for both racing thoughts and anxiety. You are describing physiological anxiety - I get that, too, although the symptoms are the not identical, but it is physiological, and hot temperatures work wonders on that. Even more potent is temperature contrast, when you get from a hot sauna to an icy cold pool and back to the sauna. Again, these things, unfortunately, cost money.

Other skills that I have developed: try to drink a lot of fluids, because when I go get that physiological anxiety, it becomes hard for me to ingest food and drink fluids, and that from degydration I feel worse and it is a downward spiral, so I try to sort of drink fluids and have complex meals preventatitively. And habit I have developed to help myself is chewing gum and sucking on hard candy. It all stared with my getting advice on this forum to drink ginger tea to alleviate nausea and queasiness that I get with anxiety. Well, I though that when these symptoms flare up, I am not going to be able to brew tea, wait until it cools down, and sip it. So I bought ginger candy - no work, I have a jar sitting on my counter and little plastic bags with it in the car and in my purse.

Here is the product:
Ginger People Gin-Gins Hard Candy -- 3 oz - Vitacost

So their taste is pleasant and yes, they quell nausea, but I also noticed that the simple act of sucking alleviates anxiety, so I use then quite a bit, sometimes preventatively and sometimes to make things better once anxiety starts. I think the rhythm of sucking and that your jaw moves and the muscles of your mouth are busy doing something is what does the trick. Also, the pause seems to be doing the trick - when I put a ginger candy in my mouth, I sort of say that everything else pauses and needs to wait.

The same is true of gum chewing. I started off to prevent cavities - I get Xylitol-rich chewing gum - but then noticed that they help me transition from one activity to the next and yes, help keep anxiety at bay. So basically when I am unsure what to do next, I pop up and chew on it. And I am studying for exams and so far have been doing well, so it was a pleasant surprise to read, just recently, than chewing gum stimulates brain activity. Here is the product if you want to try it - you sample different tastes and then once you know what you like, buy a bug - it has 1000 pieces and should last a year. This gum is not harmful to your teeth - on the contrary, it is beneficial. As with candy, I have a jar full of gum sitting on my counter and I carry little plastic boxes with gum with me.

http://www.epicdental.com/p-88-xylitol-sampler-kit

If you do not want to try new products, just brushing your teeth and rinsing with a pleasant tasting mouthwash might do the trick.