Inflamed nerve on tooth seen on x-ray. Anyone been through this and everything turn out okay?

I have had 3 babies in the last 4 years. For the last 2, I do clench my teeth (I never really have jaw pain or anything from it). But I had some wear on my retainers I had for 3 years and also a little wear on my back molars. So a week ago I got a two piece occlusal night guard that I have been wearing every night.

I have had tooth sensitivity on like all my teeth for awhile (it’s not painful), just annoying. I went to my dentist a couple days ago to try to get to the bottom of it more and he said there’s inflammation at the root of my tooth. So he adjusted my bite slightly and to wait a week and see if it improves and that he would send me to endo. After reading, I’m terrified of pulpitis and really really don’t want to end up with a root canal. any positive stories?