Citydeer has said everything I wanted to say, but I just wanted to let you know it worked for me. You need to keep telling yourself that the anxiety is a temporary feeling that will pass. The more you can invite calm acceptance into your life, the better.

I also found guided meditation and hypnotherapy mp3's really useful to help me with calmness.

I also think a good self help book or two is invaluable, but you might have to buy or borrow a few before you find the right one for you, as everybody's different. I found "At last a life" to be very unhelpful for me, but Claire Weekes's "Self Help for your nerves" and David Burns's "Feeling Good" to be life-savers. Somebody else will find the opposite to be true.

Best of luck with your therapy, it can make a world of difference if you give it a chance.