I'm not sure I have any advice to share but I wanted to respond because I am in a sort of similar situation. I had a hysterectomy 2 weeks ago due to fibroids and adenomyosis. Terrible anemia, hgb was 6.2 and I ended up in the hospital with a blood transfusion. Like you, very low energy for a very long time. I had no idea of my condition and thought I was just tired from my crazy schedule. I was able to work out 4-6 days per week but mostly low-energy stuff (yoga, walking). Every time I tried to get into a body weight primal blueprint type workout regime I would be too tired to maintain it for longer than a week or so. Now I know that my failure was due to the fatigue from the anemia.
Anyhow, 2 weeks after the surgery I'm feeling great (I had laparoscopic so my recovery time has been brief). My iron is the highest it's been in a really long time (11) and am so excited to get back into working out primal style. Through it all I kept up a mostly primal diet and that I believe is what enabled me to be so high functioning despite the severe anemia.
Ignore all those hysterectomy scare stories you see on the web. You are on your way to being a much healthier and stronger you! Good luck with everyone.