Trouble breathing?

Anyone ever have any trouble breathing all of a sudden? I just spent about 3 hours wheezing coughing and breathing really rapidly for absolutely no reason it has never happened to me before. Right before I was going to leave for the hospital I decided to try a puff of my boyfriends inhaler and it worked but I have never had any problems breathing or with my lungs at all. Has anyone had anything like this ever happen and if so what was the outcome?