Will the lump under jaw after dental implants take a while to go away?

Lump under jaw developed a month after dental implant? Does it take awhile to go away after antibiotics? I developed a painful lump under my jaw a month after getting implants. They prescribed me antibiotics and I took them all as directed, but the lump still hurts. I asked the oral surgeon if I could be rejecting the implant, but he said we won't know till we put the abutment in, which is a few months away. Does it sometimes take awhile after infection for a swollen lump to go away?