It's not uncommon to experience some discomfort after a molar extraction, even with proper care. The on-and-off pain you're feeling might be a part of the normal healing process.
However, if the pain persists or becomes more severe, there could be other factors at play. It's possible that there's a developing issue such as dry socket, infection, irritation of nearby nerves, or even residual root fragments.
I recommend reaching out to your dentist for a follow-up examination. They can assess the extraction site, possibly take an X-ray, and determine the cause of the continued discomfort. In the meantime, continue with your diligent oral hygiene practices, including the saltwater rinses.
Remember, individual cases can vary, and a professional evaluation is the best way to address specific concerns. I hope you find relief soon.