Okay this may sound really wierd but I have found something that seems to help my anxiety at times. It doesnt help when its really bad but when its up I have started to colour. In a regular kids colouring book with pencil crayons!
I tend to be a constant blood pressure and pulse checker and also always pushing on my belly etc to see if it hurts so when I am colouring it actually seems to prevent me from doing these things and keeps my mind quite occupied. I am sure it wouldnt work for everyone but its worth a try!!!