Sudden slow down

I thought I did well overall, in spite of a few small troubles.
Later I suddenly slowed down and found it hard to go home on the train I regularly ride.
I've been home anyway, but I've been already worn out.
I remember that on the way I was walking with my wrists fixed in strange angles.
I was thinking that I was finished.
I was also thinking that it had happened often since I was in elementary school, and this was, although it wasn't good behavior, not a critical problem.
If I see things more carefully, it really isn't a critical problem to continue to work.
It was just that I had to report problem to give co-workers more security, and my problem has been pointed out because the workspace want to help me work without trouble.
This sudden slowdown on the way home deprived me of such reasonable thinking, my mind was filled with the problem I was pointed out today, and almost collapsed with negative thoughts.
I wish if someone had helped me
I now can think of what I needed at that time I was down, by writing this post.
This writing is surprisingly helping me sort out what -low self esteem- let me down and what I needed to recover. At the beginning of writing this post I imagined the image this post might be as far more desperate.