Hi I Hit My Head Really Bad And Went To

hi I hit my head really bad and went to emercency room. Got a cat scan, turned out ok. but have a very big tramatic hematoma over right eye. it is getting somewhat smaller but it's still very big and over my eyebrow. its turning gray I am wondering how long it is going to be like this? its been 16 days like this. I don't leave my house because of this. I just wanted to know will it go down and when to expect it to go away>