My cold sore appeared on my upper lip on September 5th. I was putting abreva on it 3 times a day for 4 day and this giant cold sore kept on growing. Finally I went to the doctor and they prescribed me acyclovir 400mg 3 times a day for 5 days. I went back to get a 2nd refill and now it has been 10 day and I'm out of medicine again but I still have this giant pussing cold sore on my lip. Acyclovir keeps it from pussing such a huge amount but the cold sore still is pushing out puss and is still the same size but not so swollen. What should I do? Is there another medicine out there that can help me? maybe a cream?