Your blood donation affects this but:
MCV, MCH and MCHC are tested for anemia.
Low results often means iron defiency anemia.
There is a thing called mircocytic hypochromic anemia.
Your RBC is high but it doesn't mean anything really in this case.
You don't have to worry about stroke...
RDW ( Red cell Distribution Width ) tells us your red blood cells have changed in size recently, this is typical when experiencing anemia.
Your fatique and dizzyness too.
Before you supplement with iron, it's always near necessity to measure 3 tests of:
Tell your doctor about the blood donations.
P.S: As long as i recall right, hemoglobin is the iron bound part of the red blood cell. I have to refresh memory on that one better.
Edit: I think lowering the dosage of Testosterone is good thing though for RBC atm. Supplement with iron for better hemoglobin etc but again consult doctor first nad check the tests.