I had a pretty bad cold sore outbreak at the beginning of September. 2 prescriptions of Valtrex and Zovirax and it lasted almost a month. Since then, I've had very dry chapped lips. Consistently using vaseline, chapsticks, etc... The last few days my bottom lip seems to get swollen a little, red and throbbing like a heartbeat. I've had bloodwork done, full physical, everything looks good. I'm taking daily vitamins, d3, b6 & b12 but I can't figure out what is happening. I'm scared to death everyday that I'm getting another cold sore (I've had them since I was little).