Breast Reduction

I had a breast lift/reduction and tummy tuck in July of 2008.  Since then all of the skin on my right breast died turned into this hard dark mass.  After having that for 5 weeks my dr. removed it leaving me no skin on my breast.  Since then I have developed horrible pain on the surface of my boob.  The dr. tells me that in two more months he will stretch the skin over my breast.  Will the pain go away?  Should I be having such pain?  Why did all of the skin die on that one breast?