I've just had a tooth pulled (first time, I still have all my wisdom teeth). It had already died a few years ago in a massive maxillary sinus inflammation. Due to me moving around all the time, the root canal treatment was stretched out and eventually the dentist just shrugged and told me to wait until the tooth had calmed down. Well, it never really did. It wasn't painful but uncomfortable. Sometimes more, sometimes less and the feeling even vanished for long periods of time. Recently it had started to act up again. I have a new dentist now and since the only options were to try another root canal treatment or have it pulled, I opted to end the whole thing. I'm all in for long-term experiments. But four years are enough. Seriously.
Hope you are well,