Hight potassium, high platelets, white count, severe anemia, neg ana, old mono. what could it be. i know lupus it can still be but old mono.never knew?

See below: Anemia can cause an elevated platelet count. Lupus is rare when ANA is negative and is less likely with a high platelet count and white blood cell count. The old mono that you mention is probably past exposure to mono. If you are not seeing a hematologist, you want to consider it.

Possibly, but: Possibly, but needs assessment re kidney and liver function and cause of anemia.