That is correct. TSH does not accurately indicate your thyroid status when taking thyroid med. The med dose should be adjusted as needed to relieve hypothyroid symptoms. Taking Armour thyroid, that usually requires FT3 above mid-range, and FT4 will be below mid-range. When taking Armour thyroid, the FT3 typically runs higher in range than FT4. But everyone can be different in their levels required to feel normal. Along with that, of course, you also need to optimize Vitamin D, B12 and ferritin.
For now, you need to get your ferritin level higher, and if you want short term relief from your current symptoms, you can reduce your Armour dose, until you get your ferritin level optimal in about 4-6 weeks.
Doctors never tell patients, but the AACE recommends waiting until after the blood draw, to take thyroid med. The reason is that the med spikes your levels for a short time, giving you false high FT4 and FT3. It also has a suppressive effect on TSH.
So you really can't be sure of your real thyroid levels at this time; however, as I said, I seriously doubt you are taking too much Armour, since your dose is only 60 mg.
I don't have any knowledge about the effect of tapering the antidepressant. I do know of several examples where ferritin was too low for the FT3 level, causing symptoms kind of like yours. You do need to supplement for ferritin by taking one tablet of iron daily. A good source is Iron + C , for which CVS has an inexpensive generic. I expect it will take 4-6 weeks for your ferritin to optimize. In the interim you could cut your Armour, not because of your TSH level, but to help with symptoms. Once you re-test in say 6 weeks and confirm your ferritin, then you could go back up on Armour.
After getting that straightened out, as I expect will happen, the next steps will be to get your doctor to understand that the best way to treat hypothyroidism is not based on TSH level, but by adjusting thyroid med as needed to relieve symptoms, assisted by tests for Free T3 and Free T4, before the blood draw. You also need to know B12, and supplement as needed to raise it to the upper part of its range.
If your doctor resists doing these thing, give a copy of my paper in this link, and request to be treated clinically, as described, not by TSH.
Lab results and their calculated reference ranges can vary from one lab to another. I should have asked for the ranges but I was not expecting Free T4 and Free t3 results. Please post those.
With your thyroid dose of only 60 mg of Armour I see no way for you to be hypothyroid.
Another thing that is very important. What time of day did you take your Armour and when was the blood draw that day?
Your Vitamin D needs to be at least 50, so you need to supplement with D3. typically it would take about 1000 IU per day for you to get up to 50. You also need to test for B12. It is important for energy. Most important, based on your symptoms, I think you need to test for ferritin, which is the storage form of iron readily available for use. It needs to be at least 100. Ferritin levels that are too low for the Free T3 level can sometimes cause symptoms like those you mention.
So before changing anything I suggest getting tested for ferritin and B12. Can you make this happen?
Treatment for hypothyroidism should never be based on TSH. Although TSH is a pituitary hormone that is used as a surrogate for a person's thyroid status; TSH has only a weak correlation with the actual thyroid hormones and a negligible correlation with a patient's symptoms which are the most important indicator, followed by the active thyroid hormones, Free T4 and Free T3.
It appears you were tested for Total T4 and Total T3, which are not nearly as revealing as Free T4 and Free T3, which are the small portion of the Totals that is not bound to protein which makes it inactive.
So, before going further please confirm what tests those are. and also tall us all symptoms that you have. Also what is your dosage of Armour thyroid? Also if tested for Vitamin D, B12 and ferritin please post those as well.