Since I was a kid I have had symptoms that I guess resemble anemia. Pale skin with dark circles, fatigue, lightheadedness when standing up, shortness of breath, cold hands and feet, heart often beating very strongly, lips and nails turning dark purple when cold or exercising very hard… I never had my ferritin levels tested because the two times I had a standard blood test my Hemoglobin levels came back high-ish, just under the upper limit of normal for a male. Doc said that excludes ferritin deficiency and or B12 deficiency. The thing is I don’t smoke, don’t live at high altitude and I am definitely not an athlete. So I don’t know why my levels are at the upper limit but I do feel as if it’s contradictory because my athletic abilities are terrible and I have many symptoms of low red blood cells count (?) A few months ago I started going for a jog a few times a week so see if I could get into better shape. Well I still can’t run for even half a kilometer without feeling like my heart is going to explode and my whole chest area tightening up. From just a few minutes of jogging my pulse goes to 200, my throat feels like I was at a concert screaming for hours and I feel like I can’t get enough oxygen into my body. If I keep pushing it feels like I’m going to pass out. I can walk at a normal pace for miles though. I seem to have a lot of red blood cells but I feel their oxygen carrying capacity should be better? Does anybody have any thoughts?