Sabrina:
You really should see a dermatologist. You most probably have some form of eczema which can be easily treated or at least controlled. Meanwhile, apply over-the-counter 1% hydrocortisone twice a day and Sarna lotion (also OTC) as needed for itch, so you won't scratch any more. Despite what it looks like, this rash doesn't leave permananent scars.
Best.
Dr. Rockoff