What do I do about a burn from Sally Hansen's facial hair removal?

This is my first time ever using this type of product. I followed the directions and as soon as I wiped it off, there was a burn. I have been using hydrocortisone for about a day and a half. This happened about 2 days ago and since then the burned area has become rough and slightly darker. I don't know what to do. I'm so embarrassed to the point I want to cry. Nothing will cover it up. How long will this burn last? Any treatment suggestions?