I am a 16 year old female, I have never had sex or even kissed anyone before. I have had a cough for around 3 weeks now. I just developed a cold sore on my lip, it looks like a small blister. I was reading up online how to get rid of a cold sore fast, and all these websites were saying cold sores are always caused by herpes. Is that true? If so how can that be and how do I get rid of it?