Firstly you have come to an incredible place to vent your fears, anger, sadness, questions etc. There are so many people on this site who will offer you tremendous support & give you guidance, suggestions & recommendations from their own experiences.
I too am stage 3 her2+ (also ER+ & PR+) & also in my nodes. I had a mastectomy first & have had 4 rounds of AC chemo & due to start Docetaxel with herceptin on Friday.
The one thing I have learnt is to look at this treatment as the road to the new you. Yes you may not be the same person physically but you will be stronger emotionally than you ever thought possible.
Be kind to yourself & if you have to come here to "talk" as we all know exactly how you are feeling.
Take care & know even though you feel alone you are never alone on here. Carolyn x