Had a vasectomy on 13/02/09. Now have an infection in my left testicle, now on antibiotics how long to clear.?

Told I have an infection in my testicle after a vasectomy. The testicle is swollen to the size of a Marian orange and have a burning cutting pain in it when I move around. Started treatment on 20/02/09. How long will the infection usually last. Is there anything I can do to aid healing?