Red/pink Flat Spots All Over Body. Itchy Rash On Face,

Red/pink flat spots all over body. Itchy rash on face, neck and ears. Day 1 quickly noticed the spots. They developed over night as I never noticed a build up during the day. Day 2 doubled over night. (Currently day 2). Very itchy. Not allergic to anything, had a bad headache and fever 2 days prior. I am vaccinated for MMR. Twice age 2 and 8. I’m 17.