Not commenting on any of the other symptoms or discussion here, except this (for newbies): typical symptoms of too much/too high nicotine.
+1 jamie. 36 mg in PG would send my
throat into a meltdown, as well as my brain. PG also triggers
nasty gastric things in me, and 36 mg all the time would certainly do that too. I am pretty sure PG will trigger my Crohn's disease to flair up. Fact is also that much nic in the throat all the time can cause all sorts of problems, from phlegm to hiccups to stuff "going down the wrong pipe" and coughing attacks. Even snus does this to me sometimes.
Why not just try to lower nic and/or PG to VG? And if the OP had not smoked for years before
vaping, why jump into vaping at 36 mg? That is too high for all the time vaping for the vast majority here. Unfortunately, few doctors understand vaping, and so they see serious symptoms like this, but don't know how to deal with them.
I do hope the OP is doing fine now...probably having serious nic withdrawal after 36 mg...but hopefully they are not still having these symptoms. Personally I think lowering the nic and also changing to VG juices would have solved all of this. I wish the OP good health!