I suggest the vet as well. My chin had an abcess recently and it took 3 weeks to heal completely. She needed antibiotics and a topical cream. She is fine now, but the vet did clean the abcess for us.
I called my vet this morning and we are going tomorrow. I am a bit afraid what will happen, cause she is from now on maternity leave and I have to go to her collegue... the vet said, it's nothing serious ... so we will see. Doesn't seem that it bothers my baby. Everything is fine (eating, drinking,activity) but I am freaked out :-( :-( :-(