If you do go ahead, I think it would be imperative that, as you mention, you get your Alhambra tickets with an afternoon time slot to the Nasrid Palace. For comparison, we did such a day trip, but from Nerja (much closer to Granada than is Marbella).
A high reticulocyte count with low RBCs, low hemoglobin, and low hematocrit (anemia) may indicate conditions such as: Bleeding: If an individual bleeds (hemorrhage), then the number of reticulocytes will rise a few days later in an attempt to compensate for the red cell loss.
A reticulocyte count may help a doctor choose other tests that need to be done to diagnose a specific type of anemia or other disease. A low reticulocyte count may mean a need for a bone marrow biopsy. This can tell if there is a problem with how new reticulocytes are made by the bone marrow.