Have you changed anything recently? In general, learn the things that are irritants and switch away from them some.
Pg and vg, of themselves, are not irritants but pg does less to protect you from other irritants than vg does. On the other hand, vg is the better humectant and if you don't keep yourself well hydraded, it'll give you sandpaper
throat over the course of time.
Some of the things that are irritants are nic, alcohol, pepper abstract, and some flavors.
First and foremost, keep yourself well hydrated. One of the first rewards of failure to do so is sandpaper throat. (btdtnt = been there, done that, no t-shirt lol).
I once purchased some berry flavored premixed that give me sand paper throat. I'm not sure why, and I haven't tried any since.
Just my .02 and ymmv. Hope you get it sorted quickly.