Suggest Treatment For Itching And Rashes In Vagina After Using Climara Patch

I have been using the climara patch for eight weeks. I read one of the side effect is a rash and itching. I woke up one morning my back had a rash and was itching bad so was my vagina. How long do it take for the climara patch to get out of your system, I been off the climara patch for two weeks. My vagina and back is still itching.