Sil, sorry to hear that you're experiencing withdrawal symptoms. I'm also facing them, having come off propranolols in a rather short weaning off period I must admit. I've posted something similar to yours here ---> [url="http://www.healthboards.com/ubb/Forum57/HTML/000911.html"]http://www.healthboards.com/ubb/Forum57/HTML/000911.html[/url]
If your feelings of anxiety still persist after some time, why not talk to your doctor about prescribing you some temporary anti-anxiety drugs? I stress temporary because these drugs can be very addictive once you've gotten used to them (I was on Xanax for about 10 months and had some difficulty getting off them)...
My doctor has also suggested some technique called the Silva Mind Control technique popularised by Jose Silva. In summary, he teaches you how to relax and heal yourself through the control of your own mind. I haven't read the books yet so I can't attest to its effectiveness, but like any other self help book/medication, it'll probably work for some people and prove utterly useless for others...