Hi Suzanne,
The blood test showed clumped red blood cells. That is not a specific symptom.
The white blood cell count was low. That can be dangerous because your mother can´t fight infections.
When the doctor stressed that she should go to an emergency room if she had chest pain and so on he was perhaps thinking of adverse reactions to Aranesp. If I was in your shoes I should call him and ask. Here is a link about Aranesp:
http://www.rxlist.com/cgi/generic/aranesp_ad.htm
Kind regards
Birgitta-A