I feel useless repeating what others have said, but...Go see another doctor.
The problem with many "life-long" doctors is they start to think they know your body, and thus, can predict what can/can't go wrong. "Oh, that must just be Y", "Oh, that'll be the X coming up again". You may feel like this pain is in a whole different playing field than any pain you've ever dealt with, but that's very, very hard for a doctor to assess - "Okay, lots of pain. Take the same painkiller I give you every time".
The problem with many "life-long" doctors is they start to think they know your body, and thus, can predict what can/can't go wrong. "Oh, that must just be Y", "Oh, that'll be the X coming up again". You may feel like this pain is in a whole different playing field than any pain you've ever dealt with, but that's very, very hard for a doctor to assess - "Okay, lots of pain. Take the same painkiller I give you every time".