Hi welcome to Health care magic forum.
Thanks for calling H.C.M.Forum.
You got rootcanal treatment done in the late afternoon. after finishing procedure you are feeling
severe pain. One and half weeks back your
dentist put you on antibiotics, and did a pulpectomy, (left the tooth open, to drain, )it is worse now than before.
It appears that you had an infection of the teeth and gums.
the pain is unbearable means, the antibiotics he has given are not sencitive to the bacteria, present in your mouth.
Anaerobic and aerobic antibiotic combination should be used, for relief. pain killers other than the
ibuprofen may be used .
Wishing for a quick and complete recovery.
Best regards.