My blood test show rbc-6.97; mcv-62.4; mch-21.0; rdw-15.7 and billirubin 25.3. What can be a problem, and what to do?

You need to see doct. I am concerned about your bilirubin level of 25.3 mg. Is this real? Normally bilirubin level is about 1mg. Unless you are yellow(jaundiced) this level can not be right. If you have jaundice, you have something seriously wrong which requires immediate medical attention.