Billy, interesting enough, your Free T3 results have a large variance between the two sets of labs. Granted, the reference intervals are different, so I go by the percentage of where your results are at within the respective ranges.
1st set of labs you're at 21% of the reference range (2.0 - to 4.4 pg/ml) 2.49pg/ml
2nd set of labs you're at 61% of the reference range (1.71 -to 3.71 pg/ml) 2.93pg/ml
I was going to compare the Reverse T3 ratio on both labs to see if that stayed consistent, but I didn't see an RT3 on your 2nd set of labs. The reference intervals on the first set (2.0pg/ml to 4.4pg/ml) is the more common series of triiodotthyronine serum assays through Labcorp. On the first set of labs, your FT3/RT3 ratio is a little bit lower than what might be desired. If both set of lab results were similar, then this would be a key talking point IMO. However, it's like night and day between the two.
If possible, can you look at doing another set of
thyroid labs, using the first set of LabCorp FT3 serum labs? That should be LabCorp reference #010389. Another TSH, Total T3, Reverse T3, plus antibodies (TPO & TgAb) would also be pertinent for this discussion.
If your T3 is at 20% of the reference range, then this could present some form of central or overt hypothyroidism, which could indeed be contributing to some of the issues that you're describing. Not looking to add more cost to your bottom line, but I think it's definitely worth another look.