Hi Molly. I'm sorry you're feeling so bad. Welcome to the board. You will find a lot of support here.
I, along with other people here, also have feelings of unsteadiness. If you have a few hours

you can do a search by my name and find some of my posts about it. I feel that my lightheadedness/off balance feeling is what caused my anxiety, and not the other way around. I am still trying to find the cause of that and have a couple of theories right now. I could be totally wrong, and it could very well be caused by anxiety, but I don't think so. I have learned to somewhat overcome it. I finally realized that yes, even though I do feel unsteady at times, I have never passed out, or fallen, or anything like that. I don't fight it anymore. If I feel lightheaded I just let the sensation come and not try to dwell on it. I lean on things when I talk to people too. That isn't a big deal. Most of my friends know that and are just used to it now.
You can't let this take over you. I did for a couple of years and wasted so much time. Do what you can do, and if you're not feeling up to something, don't do it. But don't be afraid to do things. I have good and bad days and on my good days I try to make the most out of them. This is the best advice I can give you. Trust me, I know how hard this is to deal with.
As for the anxiety itself, I wish I knew what would make it go away. I am having a really bad week of it right now myself. I've tried therapy and it didn't work for me. I'm pretty sure I have had some form of anxiety all of my life.
Again, welcome to the boards. I'm sure you will find some great support here!