This sounds like classic anxiety and panic disorder. Just try to say to yourself that it is uncomfortable but nor dangerous.
A common symptom for severe anxiety sufferers is hyperventilating and other breathing problems. But while this is common, you have a doctor who told you it was your asthma and your inhaler wasn't working. Was he right or wrong? Many people report doctors not giving them the best treatment when they are anxiety sufferers, so are you saying your doc was wrong or what? Nobody on here can diagnose if you have something physiological going on or if it's a symptom of anxiety. So while it is a common anxiety symptom, it can also be a symptom of something else. The only thing we can advise on here is that you appear to have a pretty bad anxiety problem no matter what's causing this particular problem, so what are you doing to treat that anxiety problem? The waking from surgery situation sounds a bit odd to me. You were there, I wasn't, but after surgery you're usually so sedated from the anesthesia it's about the only time we're anxiety free. It takes longer to wear off than just that. Because anesthesia suppresses every bodily process, some people might need a prompt to breathe deeply. The last time I had surgery, because I didn't sleep much beforehand, they had a hard time waking me up afterward, I'm told. They told my wife I was awake and in distress, but in fact I was just asleep and dreaming, probably, because I have no memory of waking up at that time. I was just really tired because I don't sleep well and I was able to sleep thanks to the drugs in my system. I'm only saying this to note that waking up from anesthesia is weird. But again, if you're this anxious, are you in therapy for it? On meds? What are you doing about the part of this you know what's going on? The rest of it we don't know any more than you do, hopefully your docs will get their act together and properly diagnose this problem as either anxiety or physiological. Peace.