This is what PG does to me, and for many others too. All my juices are VG. VG does not dry me out much, if at all, and no headache...unless I push the nic too high. Not sure what JC domestic is...if its Johnson Creek I don't see "domestic" on their site. Perhaps someone else can jump in.
Some have no issues with PG at all. Those that do report dry mouth and throat, or even sores forming, and headaches. It is commonly called a "PG allergy", but as a chemist it just seems to be a chemical sensitivity, not an immune response.
And even if it all in your head, which is highly unlikely...you can't just think your mouth chronically dry...if the VG is better and more enjoyable, and doesn't dry you out, then
vape VG juices!