Can you help me identofy this lump on my lip? please =D

hey everyone 3 months ago i had a lip piercing , the piercing was preformed at a propa studio but the piercer that did it was found to have no qualifications and sacked three weeks later.. i had a blister like lump appear on my bottom lip.... and was told by the piercers that this will go down.. the lump kept going flat then swelling up to a hard blister type clear lump....i took anto biotics and even took out my piercing because i thought it was infected...

since then i have been doing sea salt rinse and cleaning properly but the lump on my lip keeps growing and then shrinking then returning maybe few days later...its sore and tender.

heres some pictures.