Alice
Are you taking a hormone inhibitor? At your age I feel it would be to your advantage. Check with your Onc for the one he would recommendif you are not presently on one.
Out of trial Herceptin also has been more effective in combo Tx's.
You really need to stay on it as it sometimes works well after more time. Herceptin alone usually given as a prevention or maintanence therapy.
Warm well wishes and Hugs,
Christine@her2support.org