see an endodonist asap.. a good one will figure it out.. general dentist are horrible at doing root canals..
Post -op discomfort or sensitivity of root canal treatment may last 2-4 weeks.There is usually no unbearable pain involved.If the x-ray does reveal a good result, I would suspect the presence of vertical fracture that might contribute to your unbearable pain.Verical fracture generally can not be detected in the early stage.However, as the condition goes on later, it will be demonstrated in the late stage. In the early stage, vertical fracyure can be investigated by surgical exposure of bone and root.Restoration of crown is generally postponed until the the tooth remains asymptomatic.