Hi Kazza909
The symptoms you are describing are perfectly normal for a stem cell transplant. I had one just over 4 years ago and felt very ill for the first two weeks immediately after it. I had uncontrollably sickness and eventually had to have anti sickness drugs pumped directly into my bloodstream to stop the nausea.
But be reassured, I started to feel a lot better by about day 12 post transplant. I was then able to sit up and watch TV. Before then I was too unwell. Hopefully then your mum will be feeling a lot better in a weeks time.
Good luck.