I dont know what it is but to me it looks like a rash of some sort, or maybe you are alergic to somthing or had a bad reaction but I would most def go to doctors n get some cream to calm it down.

Hi,

this might sound obvious, but do you wash your pillow cases regularly? I had a problem with acne on my jawline and cheeks that began to look like your picture and I began to change my pillow cases more regularly. It helped a lot.

Yes, what you have looks like some sort of allergic reaction. Definitely check your detergents too. Have you changed detergents recently? Try not to sleep on your face, etc. These tips helped me immensely.
Good luck. I know what it is like to have sensitive skin.