hello and welcome to hcm forum,
i would be glad to answer your query,
i would like you to know that whenever following the
root canal treatment, pain persists then it clearly states reinfection,
ideally, tooth is retreated or extracted depending upon the current condition of the tooth,
but i would advise you to see an endodontist soon as infection spreads rapidly.
If the pain experienced by you is severe and spontaneous then i would advise you to see a
dentist without delay in the appointment.
I cannot inform you if the current condition of the tooth is severe or better than before until checked clinically,
i hope i answered your query,
i wish you good health.