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I feel for you as you have this troublesome situation and the root anomaly you are talking about will be fine.
The main concern here is the pain you feel on and off.
If we deduct the probability of gum disorder, then just the pulp pathology will be left behind.
Now, for the pulp pathology, I want you to take an X-ray and talk to a dentist. He may suggest a root canal of the said tooth, and you can also put a beautiful crown of zirconium over it.
I think it will settle the problem permanently.
I hope it would help you, and feel free to ask anything. I understand your situation.
You may try a desensitizing toothpaste with a soft toothbrush twice daily.
And have an Advil (Ibuprofen) just for two to three days. You will feel a bit more relaxed.