Ah I know how you feel @lindatonkin1! If my memory serves me right, I think mine came on suddenly as well. If I can offer you any quick advice and even a quick fix, that is, I would first tell you that you should slow and calm your breathing whenever and wherever possible throughout the day...I know, it's somewhat of a paradox. Mine got worse before I realized that breathing more likely caused my symptoms to get worse. When I began to slow down my breathing and breathe as much as possible through my nose and learn to control it, thats when my symptoms improved. It's worth a try.

Try, even for a week, to resist the deep breathing as much as possible until you absolutely need it and see if that reduces the occurrences of the need to take deep breaths.

That's interesting about the dysphonia diagnosis. Did you have a hoarse voice when you went to the ER? Have you gotten any tests done to try to get to the bottom of it?