And Yes, I responded to all your asks.
Valium will keep you calm. And just because the cyst hasn’t caused nerve damage doesn’t mean it won’t cause pain. There’s something growing in your joint. This causes all sorts of sensations, including pain. I know, because that is precisely what happened to my thumb, except that the thing growing in my joint was a fragment of bone growing in at an odd angle. It too did not sever a nerve, but it was pressing on the joint and completely immobilizing it.