I know you said you have a doctor phobia (so do I), but - are you on any medications for your asthma and/or anxiety, or any other conditions, whether prescription or over the counter? Have you increased the amount of water or other non-caffeine drinks that you use since you started vaping?
A few years ago, when we were getting ready to move from Ohio to California, I was having some real problems with anxiety/depression. We kept trying different medications, in different dosages, for the anxiety and depression, in addition to my regular blood pressure medication and medication for my allergies. My daughter and I had also just started vaping earlier in the year (just Blus, but still). I started having problems when I tried to lay down to sleep - I felt like my throat was closing up, and I had an incredible case of dry mouth. I started sleeping sitting up on the couch. We had never heard of ECF, and never connected vaping with my problem, but some of the medications that I was trying/using contributed to what I now realize was dehydration, combined with anxiety over a major life change, and the fact that I am a chain vaper when I am anxious.
I started drinking more water, Koolaid, root beer - anything without caffeine, since caffeine was making the anxiety much harder to cope with. I sucked on hard candies. I got a couple of "dry mouth" sprays. Things settled down a bit after a few weeks, and I was able to get back to a "normal" lifestyle. I now recognize when I am not drinking enough, and take steps to correct the problem.
It may help to figure out what is going on if you sit down and consider what is going on in your life, including medications and lifestyle changes.
If you continue to have problems, please see your doctor, if only for your own peace of mind and to rule out something serious.