Yes, I have this difficulty and have to pre-prepare or write many things, though it's improved slightly the last couple of years. The first time I filmed myself practising to give a presentation I was shocked. While doing it, I'd felt at my most articulate, but watching the recording showed I was the opposite. I didn't know about autism/AS at the time, but could see that there was something very different about me. I re-watched it again about a month ago and would put it up to show if it did not hurt to watch.
Callista wrote:
[...] but of course, a speech/language difficulty would produce anxiety when attempting to communicate, as one is often anxious when afraid one will not be able to do something difficult.
Yes, and that's something people don't get; they just say to stop being nervous and the problem will be solved.