Interesting. Would you consider yourself an introvert or an extrovert, in general? I am an introvert and when I did 10 days of silence and meditation, the lack of social interaction was the easiest part for me. In fact, I think it made the whole experience easier for me because it alleviated the pressure to interact with people. I had none of the experiences you mentioned. And I was by no means an experienced meditator.
One thing I've always been really curious about is how an experienced meditator like a Buddhist monk would deal with forced solitary confinement. I think they would probably do much better than the average, untrained person. Now that would be a really interesting experiment.