Hi
Thanks for choosing HCM, shall be gland to answer your query.
Apparently you have developed infection 24-72 hours following the bite.
It is definitely related to the dog bite.
You are advised to visit the hospital for the following:
Careful examination and 
first aid like cleaning of the wound,
This is category III dog bite which is treated as follow: 
Inj 
Tetanus toxoid into the muscle
Inj Anti 
Rabies Vaccine   4 doses on 0,7,14, and 28 days into the muscle preferably in the buttocks
Inj Anti Rabies Serum   50% on the bite site and 50% into the muscles.
A course of appropriate antibiotic to treat the infection following dog bite.
Since the 
immunization status of your dog is not mentioned, so better take an opinion of the treating doctor.
Wishing you a very good health.
Should you need more information, please feel free to send your query to HCM.
Best regards.