Hello Doctor. I Am A Male, Age 56. I Had

Hello Doctor. I am a male, age 56. I had a urinalysis on 9/24/15 and again on 10/23/15. For hemoglobin, the result for both tests stated: 3+ Critical High. The reference range is: Negative. After reading this, I wondered why my doctor or his nurse didn't call me for follow-up, as this seems to be something of significance to me. Can you tell me what these 2 results mean?