Hi - You need secon opinion and a new oncologist. DO NOT put up with this guy. You're going to have a long-term relationship with whoever your oncologist is, so you want/need someone you can relate to, someone you trust, and osmeone who listens to you as well as he hands down edicts from on high.
As for his treatment plan - I'm confused. The Herceptin I understand; it's a long-term drug, one you'll be taking for years. The anti-hormone - ??? Is this to neutralize the progesterone? Your ER is negative, so it's not for that. And the chemo - not sure what drugs he calls for, so can't tell how aggressive that is.
Since your nodes were negative (HUGE plus there!), I'd ask if the Oncotype-DX test is appropriate for you. It's a test that helps you detemine whether chemo would be mor elikely or less likely to prevent a recurrence. But before you do that, I'd ask for a referral to another oncologist. Hopefully you're at a big enough facility that they have more than one. If you're considering another facility, take a look at this list of Comprehensive Cancer Centers, which are the top cancer facilities, as designated by the government.
At any rate, good luck. Hope things work out for you. And stay in touch here - we can help. PJH