68 yr old Mom w/ HER 2+

[Hopefull]

My 68 year old mother was dx a few weeks ago w/ HER 2+, er-/pr-, invasive breast cancer. Lymph Nodes were negative, PET scan negative. She had Mastectomy 10-18-07. She started carboplatin/Texotere/Herceptin yesterday. I have been reading on this blog for close to 2 weeks and have felt MUCH better after reading others stories.
My biggest frustration is that I can't find much information on Prognosis. I have read that this is an aggresive cancer w/ high rate of reoccurance...I have not seen where it reoccurs??? If anyone has a link please forward to me. Her MD just says we will do her Chemo/Herceptin every 3 weeks for 6 rounds and then just Herceptin every 3 weeks for 12 mths. And then she will be fine. I want to believe that very much, but I also don't want to stick my head in the sand and be blind sided later if the Cancer returns. Please help me remain "Hopefull".