I am 37 yrs old and had total knee replacement on July 2nd. Since surgery I have been sick at my stomach, horrible abdominal cramping, diarrhea to constipation daily, very faitgued and difficulty concentrating. I have done excellent in rehab & therapy and the wound has healed very well. I have had no fever. I started having lower back pain 2 weeks ago and now have had 2 different instances of petechiae across my lower back. They have run blood tests and stool samples for infection and everything was negative. The once the petechiae started they ran another batch of tests and my platelet count has gone from 518 to 589 in a 10 day time frame. They have had me on Zofran, Levsin, and Sucralfate for 3wks and I'm still sick. The last blood test results came back and they have given me a "urgent" referral to a Hematologist/Oncologist without much explaination other than that's the best course for me now. Can someone shed some light on my situation, I'm nervous and don't go in until tomorrow to the new Dr.