Just a couple of ovservations - Don't be repeating decongestants every four hours if you are taking the 12 hour variety. Check the box first.

If dryness is an issue, I forgot to mention that there are a few brands of saline spray meant for dry nose. I use it in the winter, and sometimes on airplanes. They are usually with the cold stuff, but they don't contain any medication, just saline to keep your nose from drying out. No side effects, not any worries about getting addicted to the stuff. It won't clear a stuffy nose, but it will help.