I got sunburned on my face a month ago and now I have wrinkles on my forehead. I'm 19 was wondering if they'll go away and what I should do?

Moisturize, SPF. If the burn was severe (peeled) then the new skin will be very sensitive to sun. Wrinkling at your age may also indicate that the skin is dry. I would recommend a good moisturizer and be sure to always use SPF (even when you're not planning to be outside). If you repeatedly expose your face to the sun the wrinkles will eventually be permanent.