I have always considered myself and open book, and do not care what other's may think... so here is my experience.
About 4-5 years ago when I got out of teaching and into Pharmaceuticals I was staying in a hotel during the training period. I woke up at midnight. and just couldn't breathe! Being asthmatic and not having an attack for over 16 years I was amazed at what was happening and attempted to take my inhaler but couldn't really get the med inhaled.
I walked down (almost crawled) to the main desk (couldn't talk) and ask for help. Called ambulance etc. nebulkizer treatments, etc. Was released in morning and told to follow up with Primary doc. To shorten the story, I had 3 more ambulance rides within the next 4 weeks, several tests for my lung capacity etc., and was being treated for asthma.
A few months later I was hospitalized again for not being able to slow my heart rate down. I was sitting at the computer around 10am, when my heart just started pounding and wouldn't slow down. 3-5 minutes into it, I made the 911 call again (wife at work, son at daycare) when they arrived my BP was 240/180 and they said something was going on, and quickly took me in.
A couple more events happened like that, and numerous nights where I would wake up out of breathe, or some type of breathing issues as well. Then finally an ER doc wrote in his notes to the GP that it appeared I may be suffering from panic attacks and not necessarily asthma for which I was being treated. The Gp talked to me about it, talked over the life changes etc, and what he then thought about the diagnosis, and I was put on Zoloft for "Panic Atttacks" which is technically a form of depression in expression.
I have been on Zoloft for a couple of years, and has worked well, it kinda takes the "edge" off so the attacks are limited or small. I was also told if I feel one coming on to find something to take my mind away and focus on it. Whether it be a TV show, an article, music or whatever, and then let the feeling pass. Well it has worked wonders for my daily life, but still experience a very small panic attack every so often, but nothing debilitating etc., especially understanding what it is. (Which to me is over 95% of the battle!)
Good luck to you, and I wish you the best in terms of the diagnosis, and treatment!
TSI