Thanks for asking the query,
Pain in the jaw along with swelling at the time of accident, there could be a chance of fracture
, a thorough clinical examination is required.
Consult to an Oral Surgeon and get the checkup done take an OPG radiograph see for the occlusion and broken tooth, fracture line.
At home take lukewarm saline and antispetic mouthwash rinses.
Take semisolid diet.
A course of antibiotics and analgesics has to be taken.
Hope this helps out,