A low blood count means that something in your blood is at abnormally low levels, such as red blood cells, white blood cells, hemoglobin or platelets. There are many causes of a low blood count which range the spectrum of medical severity from a simple infection to cancer. Your doctor will diagnose your condition based on your symptoms, your medical history and your low blood cell count.
At standard design conditions, air coming out should be in the range of 55 to 60 degrees to cool the house down, regardless of the ambient house temperature. The unit should be able to cool even air at 85 degrees flowing into the unit down to 60 (at the vent) if it is functioning properly. Some factors that do influence the vent temp are where the unit is located, where the ducts are, how far the air has to travel, and the air speed.
A temperature of 90F at 80% relative humidity outside will feel a lot hotter than 90F at 50% relative humidity inside. So let the air conditioner run, but work the temperatures for each setting up day by day as long as you stay comfortable.