Hi justpeachy,
I was diagnosed with triple neg in Feb 2008, had the surgery, 6 cycles of chem and then the radio tx. I image that you'll have similar chemo to me and debbie at varsity, and yes, I expect that you'll lose your hair. Strangely, I found it easier to be bald than to wear a wig, you may prefer a wig...hard to know until you get there.
Chemo is hard work, but for triple negs it's the best course of action. You will get through it though, but remember to be kind to yourself. Some days you may need to cry and some days you will laugh your head off with friends just like nothing is wrong.
Take one day at a time and you'll get there. :-)
Sian