I will pray for you and your recovery.
I did a quick search on the internet [nausea abdominal pain constipation "elevated red blood cell count"] and it pointed to polycythemia vera as the cause. Then towards the end of the article it read "If polycythemia is related to kidney cancer, liver cancer, or other erythropoietin secreting tumors, the symptoms of these conditions, such as, weight loss, abdominal pain or fullness, or jaundice may be predominant." But again I am not in the medical profession and cannot adequately assess this because this condition covers so many symptoms.
Another article read "Polycythemia (elevated red blood cell count) causes are either primary (aquired or genetic mutations) or secondary (diseases, conditions, high altitude). Treatment of polycythemia depends on the cause."