Hi My 33 daughter had a stem cell transplant 16 months ago with a matched donor. (Hodgkins Lymphoma mass in her chest) We have been on a very tricky road with GVHD,,,now in her lungs. Today when we went for blood draw, her blood had thickened so s not to be able to draw, The lab told us she was too cold and needed to drink more water. I can t sleep now ..what could this mean?