It is amazing what kind of mental gyrations we can all go through at work.
I work with people who are very easy to get along with, or try to be, but my day is usually a constant struggle with a combination of anxiety, distractability, hypervigilance, paranoia, grandiosity and self-loathing. Being in my head is definitely an ever changing experience, lol. As much as I can I try to stay to myself, and stay as busy as possible. I always hold myself suspect, and try to hold down my hyperness, and irritability. I've often thought it would be so much easier to work from home. Of course when I was on disability I never thought it would be possible for me to hold down a job. So who knows, it may get easier with time. All we can do is keep plugging away. The alternative is kinda bleak.