Hi Tracie,
I'm so glad you found us but sorry for your diagnosis. There are many sucess stories here since herceptin and you can read many of them on my thread entitled "five years out??"...I hope you find it encouraging.
I had the same treatment as you although had a lumpectomy rather than a mast. The a/c was the toughest for me but is very do-able and really was'nt as bad as I ahd feared. It may seem like you'll never get through it, but of course you do. I'm five years out now, and wonder where the time went to
Just remember no matter how bad you feel, there is an end and life after bc!!!