Am I being overly anxious?

Hi. You've had great responses from the others. The research indicates that agressive cancers, in paticular triple negative or Her2 positive  respond well to chemo.  Having chemo first, any stray cells cells will hopefully be "mopped up" before they have a chance to establish or hide in dormancy. By having chemo first, you're giving them less time, so hopefully better outcome. Not everyone has a complete pathological response, but I would have to say, of recent times, most of those, and certainly those who are Her2 pos, have had excellent responses,  from my observation. 
Personally, I actually think it's quite a logical way to do it, if you know chemo is going to be part of your treatment.
Take care