Hey Sandra
Sounds to me that you might be pushing things so close after treatment and still undergoing herceptin has got to take its toll on your body. I still have chemo brain and finished treatment a year ago. Is it possible to miminise your hours for a while to give your body some healing time? I work part time and struggle some days. Its important to make sure you have the right work life balance for you. Sounds like at present work is taking over a bit and probably not a good time in your life for this to be happening.
Maryrose