My hemoglobin is 8.3. what effects should i expect from this level?

Anemia symptoms: Individual tolerance for anemia is quite variable between individuals, largely in proportion to two things-- the time course for development of the anemia, and the overall health of the individual and their activity level. If you are mostly sedentary you may not notice this, but if you are suffering form heart disease and living at high altitude, it could feel very fatiguing.