Four days ago, I developed a severe cough and fever. I was able to stay hydrated and get lots of rest over the weekend. Physically, I feel a lot better. However, I now have two fever blisters that not only itch and are sore, but are swollen and very ugly. I had to return to work. I am currently using Carmex, which does not seem to be working. I continuously wash my hands and use hand sanitizer when handling work items and coming in contact with others. I think I need a prescription. Am I wrong?