If anything is clear, I guess it's that solving these problems is not easy. In the back of my mind I have this nagging fear that even if I have a root canal first and then have an extraction and get an implant, the pain may never go away. But that would be extremely unlikely. Right??
I guess we just have to place some faith in dentistry and hope for the best. Are you confident that you have a good dentist? Have you thought about getting a second opinion? Two years is a long time to deal with nagging pain. If you're like me, you've mastered the art of eating very carefully!
I got a night guard a while back (well before I had any cracked tooth symptoms) but I haven't worn it consistently. I had a vague sense that it wasn't doing me any good. At first it was surprisingly large. Then I moved and my new dentist said my old dentist hadn't made it properly. He proceeded to cut away a huge amount of material from it and he also made some minor adjustments to make it fit better. I still gave up wearing it after a few weeks. Did your endodontist explain why he or she didn't recommend a night guard? I have been told that clenching and grinding can crack a tooth. My latest dentist has recommended a soft night guard, which I'm pretty sure my last dentist said would be worthless . . .
When my pain started it was hard to tell exactly where it was coming from. My dentist didn't seem to believe that it was the tooth I said it was, but I confirmed it by biting down on the cotton tip of a Q-Tip and there was no doubt about the tooth that was hurting.
Is your tooth sensitive to temperature? Mine was sensitive to cold for a long time. This got worse and eventually heat started to bother it as well, which is not a good sign. Still, nothing shows up in x-rays.
Good luck on Monday and let us know how it goes!