Short answer: yes. And I think your medications are at the root of your issues.
I take 9 different prescribed medications. And everyone of them has potential side effects. I know of people who have been amiodarone for over 20 years and have had minimal issues with it. I am not one of those people. Nor, by the sounds of things, are you.
Amiodarone is considered the "gold standard" treatment for arrhythmias. I won't tell you of my entire experience with amiodarone but suffice it to say that I, too suffered from raised TSH levels while on it. Not as high as yours but bad enough to impact my quality of life in a substantial way. I, too, experienced fatigue, depression, and general malaise. But now your TSH level has now dropped too low. Yes, it is still within the parameters of "acceptable" - indeed, on the low side of normal. But those parameters do not serve all of us equally as well . You might be the "exception to the rule".
Why are you still on the levothyroxine if you are no longer taking amiodarone? Or are you still on Flecainide?
If yes, can you ask for a lower dose? In Europe, cardiologists use a much lower dose of amiodarone (100 mg.) than we do here. Studies have shown the lower dose to be as effective in most cases. Especially in older patients. Perhaps the same is true for Flecainide.
Too much levothyroxine can cause palpitations. I don't know what dosage you are on but I think I would seek to have it reduced. Then have regular blood tests tracking your progress. Perhaps, if the dose is lowered, then the palpitations will resolve themselves.
As for the low hemoglobin, low ferratin stores will cause arrhythmias. I experienced an upper GI bleed, a very small one that went undetected for several months but it resulted in my hemoglobin dropping below acceptable levels. When that happens, your body starts to use up your iron (ferratin) stores to "keep the lights on", as it were. I began to experience sustained and non sustained SVTs, several hundred a day. Long story short, the GI bleed was found, iron supplements were started and, 4 months later SVTs have stopped. Hemoglobin levels have returned to normal and, after that happened, iron stores started to replenish slowly.
I expect the transfusions addressed your immediate hemoglobin issues. And that your physicians have addressed the bleeding ulcers. But I can tell you that ferratin levels take a while to replenish.
I am happy to report that my thyroid function has returned to normal and I am no longer on any type of anti-arrhythmic medication.
I have come to the conclusion that we, as patients, must advocate for ourselves. We are all individuals and what might work very well for one person, might not work as well for me....or you. It is sometimes challenging to convince our physicians of that.
All the best.