I currently suffer from social anxiety disorder. Have you ever heard of that?
Yes I have, I have general anxiety. It doesn't affect me socially as much, but I have experienced it before. 
It can be overwhelming but if I can avoid certain triggers that is helpful.
I'm sure it can be. Anxiety in general can definitely get overwhelming. 
Sometimes I have even had panic attacks. That is the worst.
I have had plenty of those! I have had much less as I've gotten older thankfully. They really are the worst!
Have you ever had a problem with agoraphobia, or fear of being in open spaces, or just outside the home in general?
I don't have too much experience, I do have a friend who is that way. I do tend to take issue with very crowded places
They say that people with anxiety disorder usually have more than one disorder. 
That sounds about right to me! I also have pretty bad depression, they seem to go hand in hand.