Plz help!!! Pain,swellin under fibula bone around ankle joint help possibly torn peroneal tendon!! Plz help?

i had sergury on my achilles tendon 2months ago and recently i was carryin a heavy object while on crutches and accdently put full weight on my ankle..my achilles tendon was fine but under my fibula bone on my ankle joint around peroneal tendon area was swollen PAINFUL and a straigh lump around curve!! Now i need to kno what the problem is??? Peroneal tendon tear or ankle ligaments or peroneal nerve???????? Plz helpeal nerve???????? Plz help