What Causes Painful Sores In Vagina With The History Of Skin Cancer?

Hi, I have been suffering from what I thought was a yeast infection, I purchased some monistat but it has been a week now with no relief. 2 years ago I had skin cancer removed from my vaginal area and now I have extremely painful sores in the exact spots i had this removed! I have my regular pap smears and just had all testing done during pregnancy 4 years ago. I have been with the same partner for 6 years now. Please help!