AlwaysChanging2-I have often experienced what you describe in your
first post here, and it was diagnosed as Sensory Overload. Not saying
that is what you have, but it sounds very similar. Your solution of
focusing on something is very smart. Unfortunately, mine hits me so
quickly there is no time for rational thought. Goes right into panic attack
mode. I had to quit driving because of it. Wonder if it is connected to
PTSD?

To the original poster-I agree that you need to speak to someone.
Things you can do in the meantime-read and study about this disorder,
keep a daily journal, eliminate as much stress from your life as you
possibly can. Take some of the quizzes here, read the articles on this subject. Stay involved and keep posting. Best of luck.