I have been having problems donating plasma because my blood has become very thick. I am bruising very easily and have had alot of pain with my menstural cycle. One of my friends said that the same thing happened to her sister right before she was diagnosed with lukemia, im terrified of going to the dr. Has any one else had these problems with out such devistating results? I am 100% positive that i am not pregnant, and i have never had any of these problems before. What should i do?