First let me assure you that it is highly unlikely that there is a 'needle tip' in your sift tissues. The needle is designed so that if it shears off it brakes at the hub, this is so that it is obvious to the dentist and easy to retrieve and this rarely occurs.
It is possibe to have been associated with a tooth that has had root canal treatment even though there is no living nerve in the tooth. The soft tissues supporting the tooth can become infected and this would be excerbated when chewing thus you are able to localise this pain very precisely.
It is worth noting however that a root canal treated tooth should always be considered to be a tooth with a finite life span.
The pain you are desribing sounds like pulpitis there will be one (or more) teeth which have an inflammed pulp/nerve chamber usually due to decay and this can be difficult to localise so would typically feel like all the teeth in a given region. It is unlikely to be due to dental local anesthetic.