My tumor was the same as yours but still considered early cancer.  I had 4 different chemo's (two at a time)and Herceptin for eight months and just had 3 yr mamo and am cancer free--Survivor.  Yeah.  It is a tough regimen or was for me as I seemed to be ultra sensitive to chemo, but after first infusion of Herceptin it didn't give me any problems.  Unfortunately I have long term side effects from Adiamycin; cytoxan. taxol and taxotere.  I had one sentinel node positive so also had 33 radiation treatments.  You will be fine and the hard part will be over before you know it.  Good Luck to you and God Bless.  Let me know how you are doing.   Hugs Cindy