so, pus has been coming out of my gums.. and it's one of the teeth holding up my bridge on the front. I went to the dentist, he vacuumed it out, and he gave me 2 prescriptions. Penicillin and chlorhexidine oral rinse. I've been using these as prescribed. I started using them last Tuesday. It's Saturday now and there's still pus coming out. I'm supposed to take penicillin for 7 days. How long does it take for penicillin to work?