"ONJ associated with use of drugs such as bisphosphonates, denosumab, or romosozumab is referred to as “medication-related ONJ” or MRONJ.Apr 11, 2023" accordind to the American Dental Association.
It is rare! But with jaw pain more intense than ever before you might consider ( with your doctor) discontinuing Evenity. With the third injection you have received the best of the drug since the next 9 months would be antiresorptive. Paul Miller suggests that administering Evenity for three months might be a better option, since it was unknown at the time of approval that the next nine would be antiresporptive.
I would be wise to inform your prescribing physician (at the risk of being reassured that it could't be MRONJ), so you can begin considering what you might transition to.
There is currently no method of diagnosing ONJ. It begins with swelling and pain.
It could just be the joint pain that many experience with Evenity. I hope it goes away.