I don't have a medical background, so don't take this as the final word. I have both herpes and warts and believe it or not the two of them presented similar symptoms for me. (this might not be the case for everyone.) The itching around your mouth does sound like herpes, but the clusters sound like warts. Sorry to not be very much help but getting tested for both, and other stds too, if you can could help you to eliminate some of the guessing.

good luck