Both PG and VG are basically stabilizers used in many applications from food (as a humectant, stabilizer, and/or sweetener) to machinery (as a lubricant or antifreeze). Both have very low/no toxicity and are considered safe for consumption provided the source is of pharmaceutical or "USP" grade. Since both are considered humectants, their nature is to attract and trap moisture. The drying sensation you are experiencing could be a sensitivity to this as the substances may be dehydrating the soft tissues around and inside the mouth or nose. You could also have a similar reaction from detoxing from cigs if you recently quit smoking. Drink plenty of water. More than you normally would. This is important. Some people have a particular sensitivity to PG and cannot tolerate symptoms of throat, lung and sinus irritation. If you think this is the case, then you may not want to have any PG in your vaping. The ratio of PG/VG in vendors' juices has more to do with throat hit and flavor transmission. Pure VG is very viscous, tends to lack th and is a poor carrier of flavor, whereas PG is less viscous, has strong th and carries flavor well. Nicotine also adds inherent th. Many vapers have found that a mix of both PG and VG gives the vaping experience a more desirable balance between viscosity, th and flavor transmission. Some people prefer 100% VG. Most prefer a ratio between 50PG/50VG and 80PG/20VG. I haven't seen anyone capable of sustaining 100% PG.
So the short answer is, no. It's not just you. Remember to hydrate yourself. Pay attention to what your body tells you. Buy juice from reputable (USA) sources. And search the health threads for more specific info. Good luck.