Hello Dear
Thanks for your query and of course thanx for writing in detail. I will be most happy if I could help you out so no need to worry much. I will be discussing all one by one.
*Since your tooth was
root canal treated, it is less likely to have infection in it.
But the
anesthesia doesn't worked so the possibility of any infection and
inflammation can't be ignored.(Clinical along with Radiographic evaluation is
required)
*Dental extractions need more than one
nerve to anesthetize, so in your
case it might be possible that one of the nerve couldn't get anesthetize
due to any technical mistakes or anatomical variations (more common in
lower jaw).
• I will advice you to get an appointment with a general dentist/oral surgeon with whom you are more comfortable as early as possible so that he/she can do thorough clinical examination and will take the radiograph (
X ray) to confirm whether there is an infection present or not and start the needful treatment. (Procedure+Medication).
Coming towards the medication, since the dentist tried to extract the the tooth, there should be a wound due to instrumentation.So antibiotic coverage may or may not be required depending upon the wound.
You can't discontinue any medicine if its awful, but if you are not feeling any type of pain/swelling/pus discharge or any other discomfort in that area you may discontinue the antibiotic. I hope You will get the appointment in a day or two.
Till don't forget to Rinse your mouth with Betadene/Viodine/Betakind gargle (contains
povidone iodine solution) easily available in medical stores, twice daily.
Hope this will help you. If there is any more query or question regarding this in your mind, you are always welcome.
Take Care
Regards