I just had a tooth extraction now my throat is getting sore. is this normal?

Not unusual: But then again, you may be coincidentally coming down with a sore throat. Visit the surgeon who extracted the tooth to see if it is healing well... Then visit your physician for that sore throat.

Yes: If the extracted tooth in the back bottom , the area around the tooth socket gets a little sore, and with the contractions of your throat during swallowing that could hurts pulling on the borders of the extracted tooth socket.

Possible infection: Some times after an extraction, the area or surrounding area of the extraction can become infected and spread to the glands of the throat. A dentist should be able to examine you and quickly tell if you need an antibiotic.