Hi there,
What is your hemoglobin? A ferritin of 9 is really low. I know I felt awful with a ferritin at 30. People with anemia do have a harder time tolerating taking thyroid hormone, and they experience more side effects, like heart palpitations and a racing heart, dizziness, etc. I struggled with anemia for a year while also struggling with being hypothyroid. As my anemia blood work improved, so did my thyroid symptoms.
It sounds like you eat really well and exercise. What kind of iron are you taking? Are you taking any other supplements?
Taking vitamins and minerals has been the thing that helped me get better, but I made plenty of mistakes with them too. One thing to watch out for if you are anemic is getting too much vitamin C. Doses above 400mg a day (for a long time) will decrease ceruloplasmin, a copper carrying protein needed for iron metabolism. Ceruloplasmin isn't something routinely checked, even in anemic patients. I had to ask for mine to be checked. So many popular multivitamins have too much vitamin C.
If you're only supplementing with iron, then you should consider taking a trace mineral supplement (zinc, copper, molybdenum, chromium, etc) and a b-complex to help you make new red blood cells.
How do your fingertips look when they are dry? Are they wrinkled? This is a great indicator of your electrolyte levels. If you have low electrolytes it could be part of what is effecting you, especially if you work out hard and often. And it could be why you're having problems tolerating thyroid hormones. The serum test for electrolytes won't show a problem unless you have kidney disease or until your levels are life threateningly low, like if you ran a marathon and only drank water. Actually, Pedialite has the perfect balance of electrolytes without the sugar, if you don't mind the taste.
Another thing to try is lipothiamine - a fat soluble B1 supplement. Especially if you notice you feel worse after drinking or eating something sugary. Hypothyroidism can cause problems absorbing B1 in the small intestine. Low B1 leads to low taurine, an amino acid the body needs thiamine to make. Taurine is needed for maintaining potassium and magnesium levels inside cells, and being low then leads to heart palpitations.
Anemia and thyroid problems are a catch 22. When you improve your anemia you may tolerate thyroid hormone better, and when you can take more thyroid hormone it will help your anemia. I was stuck for months with a ferritin of 30 but slowly things shifted, I got a little less anemic and then my thyroid really improved, and now my ferritin is a 70, which is like a miracle. I almost thought they had the wrong results because it's never been that high.
Good luck to you,
Amy