You've certainly come to the right place for support. I've been blogging since May and have been soooo blown away with the support, wisdom, info and just plain down right love shown by the Pink Ladies here. So sorry you have a double whammy with BC and Sciatica. I was very scared about the chemo treatment too but I've gotten through it (certainly with a lot of ups and downs). It's a tough road but I'm sure you'll get through, finding inner strengths that you didn't know you had.
Talk with your Oncologist about your fears or your Breast Care Nurse if you have one. Perhaps counselling might help too. I'm being treated at Peter Macs in East Melbourne and all the staff there have been absolutely wonderful. I've not seen cold caps used in the Chemo Day Unit by the way.
Stay as positive as you can Mary. This is all working to get rid of that damn BC. Lots of love and hope it all goes as smoothly as possible for you.
Janey xxx