Thanks for asking the query,
I would like to tell you that pain, swelling, prolonged numbness
are common complications after extraction, you dont have to worry about that as they will subside after sometimes. There could be a chance of some broken root piece left in the socket to rule out this you need to take an x-ray.
Take complete course of antibiotics and analgesics.
Take lukewarm saline and antiseptic mouthwash rinses.
Take rest and follow the post extraction given by the Dentist
Hope this helps out.