Hello, I have 15'' rMBP from 2012 and about a year ago Apple exchanged my screen due to ghosting. Unfortunately something really odd is happening with this one now. When there is black/dark image on the screen on mid-to-max brightness I can see white dots on my screen. At first I thought it's just dust and tried to clean them off, then I thought that they might be dead/stuck pixels but it seems they are not since if i go over them with my nail I can feel a bumb so it appears to be something uncleanable. Hopefully you guys might be able to tell me what it is. I have attached pictures of the screen.