Is this necrosis, venous congestion or normal bruising? (photos)

I posted a pic about 2 Daya post op and since then the situation haa gotten progressively worse and although I think I have a good doctor I'm still freaked out. is my nipple dying or going to fall off?? The area around seems to be normal color, but it's like hard and scabby at the end and I can't seem to find anything like it.What can I do to see if it's alive. Doctor says it's fine. What the hell Is it!!