You might consider asking your doctor to do a sleep test. I was having attacks at night where my lungs would suddenely paralyze and once for over a minute I wasn't able to draw in air or exhale. (I passed out and fell off the bed and appetently in knocked the wind back on me- so I'm told,) while the dogs were trying to figure out why... ( they orig though my baby was kicking me as I was 9 months pregnant) but of happened again while I was on the hospital after delivery, and no one on the unit knew what it was or how to help, so I got CPR... Which is weird if your actually conscious. They sent me for a sleep study and discovered I have sleep apnea. (although the lung paralyzis is said not to be related, and none of my dogs have yet figured it out.)
Ok ok so where's my point? The combo of allergies and sleep apnea reminds me of your complaints. Espec the way you mention it occurs at night but your fine during the day. I use a machine that ensures air goes all the way in my lungs and since I feel great! Anxiety will make it worse and at some point a doc may say that's the cause although it's actualy a result of this mess. Sleep apnea is still relatively new. Most doctors don't even consider it unless there's a drastic reason to. I've had it since at least high school and they kept telling me my syptoms were stress treating me with every mental and psychosis coctail imaginable... But it wasn't
Umtill they final did a sleep test that they found I had sleep apnea and oxigen levels dangerously low at night. Untreated it can lead to hormonal imbalance, heart disease, basicly without your brain getting oxigen it can't properly regulate your system, glands, and organs. So! Ask your doc to tell you why you shouldn't have a sleep apnea test. At least you can rule sleep apnea out, and it beats a stress test, all you do is sleep LOL.
Cheers