Just to clarify a previous comment. If you have a legitimate, but, invisible disability that prevents you from standing in line for any length of time then that's fair enough. But, if you suffer from anxiety and stressful situations can bring on an attack then avoid that situation, that's what I try and do. I'm sorry, but standing in line isn't one of them as we have to do that in daily life.
I had to learn to deal with my anxiety attacks on my own as it is only recently it has been recognised as a condition and I did that because I knew I couldn't expect any concessions.
I see far too many people, adults and children, with life restricting or life limiting issues to feel sorry for myself and talking myself out of my anxiety attacks really helps and I am certainly not going to seek a
DAS when I am physically perfectly capable of doing things.