hello and welcome to hcm forum,
i would be glad to answer your query,
first of all , i would like to inform you that post -procedure swelling usually subside within 3-5 days.
but in your case it hasn't, therefore i recommend you to meet your cosmetic surgeon.
according to the history provided by you, lump along the jaw line is most probable due to botox
, but i cannot confirm it until clinically checked.
also,you have not mentioned anything about pain or consistency of the lump.
do not worry, the lump will resolve in some time. but do not overdose yourself with antibiotics.
i recommend application of ice all over your face and visit your doctor soon.
i wish you good health,