The views expressed by me are for educational purposes only and do not establish a doctor patient relationship.
This is Dr. D.J., experienced Internal Medicine Specialist.
I am here to address your concerns and provide great service.
Severe burning can be due to the bacterial infection.
Probably that is why the ring pessary fell off.
Another possibility is due to the injury to the vaginal lining from the ring pessary.
This can also cause severe burning.
You will need to see your doctor for urine analysis and antibiotics after confirmation of infection soon.
Infection may spread if not addressed early.
For symptomatic relief you can try Pyridium tablets 100 mg 2-3 tablets daily .
This will lessen the burning but will not treat the infection.
Also drink plenty of fluids and cranberry juice which also helps with flushing out the infection.
You can also take ibuprofen for pain control.