What Causes Vaginal Swelling, Redness And Itching?

My vagina is red, swollen, occasionally itchy and now the skin is peeling. I shaved with shaving cream about a week ago and the next day I had a rash from it but that went away and now I have all these symptoms. Plus I ve already had 2 yeast infections within the last 4 months. I changed my diet and workout regime because of them but it looks like its come back. What should I do?