Hi, I too was terrified of the pain I would feel after amastectomy.  The fear of the unknown is a lot worst tha the pain from a mastectomy.   I just had a unilateral mastectomy on, Friday, April 16, 2010.  I was home by Saturday evening and was feeling tired.  They tried to do a sentinel node biopsy, but it did not work and had to have an axillary node done.   When I awoke on Sunday it was difficult to get out of bed, but once up the pain was minimual.  I have had more discomfit than pain.  So do not worry yourself about the pain. It is not that bad, and the drains are not bad either.  It was a much better experience than I had anticipated.   Take a deep breath, relax and go with the flow and you will be OK.. Good Luck