First thing i suggest you to visit a dentist as the exact diagnosis can only be made after shooting an X-Ray. As you are having broken tooth, so more early your treatment starts more are the chances of successful treatment.
There might be chances that due to broken tooth, the nerves might have got exposed due to which you are encountering pain. Till the time you don't see a dentist take care of the following steps:
for more info on dental emergencies and their management you can visit our website...http://www.identalhub.com/article_tooth-trauma-331.aspx
Free Dental Consultation