I don't care much about TSH except that when it is near zero I know that T4 conversion rate is minimised.

If you feel well, if your heart rate is normal, your blood pressure is normal (you should have a home meter), your body temperature is normal and you have good energy then I don't care about FT3 levels.

If you still have symptoms then you'd need to measure cortisol by saliva or serum/blood - taking a cortisol reading just before you are due to take HC is OK and can provide good information.

It is good that TPO has dropped - that is all.

Paul