If you type anxiety into the search bar at the top right of this page and then open up the fourth result down you will see that anxiety is very common and around a third of people with MS have it.
I am currently going through the process of being diagnosed and I was very curious about this too. I have a friend who is at a similar point on her journey and we were discussing our respective symptoms. In recent years both of us have experienced heightened anxiety, but had put it down to other things. My friend had been experiencing full blown panic attacks. I have noticed I’ve become a particularly nervous passenger and hate being driven by other people because I seem to be hyper aware of every single potential danger and I can’t relax at all. It wasn’t until discussing it that we realised there may be a link and I looked it up.
Other peoples experiences of this would be of great interest to me as it’s hard enough to think that you are not going mad when you’re experiencing all these different symptoms. I have become a great believer in rescue remedy!
I’m afraid I can’t offer any advice on whether or not you should take the beta-blockers that is a personal decision for you but perhaps someone else here will be able to help.
Wishing you all the best and hoping you get some answers soon,