I think I'm understanding now but not convinced the zinc/selenium have anything to do with your results. (They *could* but right now there's no real proof as you have another changing variable in the mix). I completely understand that you are performing an experiment and testing a theory. I've done similar things as well - it's the only way to find the correct protocol for you.
Your results *could* simply be from raising your Levo dose and also, being a poor converter.
At 150 mcg Levo, your blood results showed a super high TSH, high T4 (in upper range? Over range?) and T3 now in range (low? mid?). Without knowing actual numbers and lab ranges it's tough to adequately advise.
To me, your first set of test results seem to indicate under medication, and that must be also what your doctor thought since your Levo dose was increased.
So then you took 175 mcg Levo BUT also started zinc and selenium supplementation at the same time.
With the increase, you said you felt overactive symptoms. Test results showed improved TSH (it went down), and increased T4 and T3 (which for many, would also be good but for you, too high T4 is dangerous).
Your latest test results actually make sense in that, adding in more Levo should lower TSH, increase T4 and also T3 (by a certain percentage) depending upon how good or poor a converter you are. There's nothing here that really proves that the zinc and selenium are responsible. Hyper symptoms could be the result of too large a Levo increase. (My endo typically does a 10% increase which would have been adding 15mcg of Levo daily and not 25mcg).
By reducing your Levo dosage, (back down to 150 mcg?) I would expect test results to return to what you had in June UNLESS zinc/selenium are indeed having some effect as you suspect. Again, a very interesting experiment.
It *could* be that you are indeed a poor T4 to T3 converter and therefore, a little slo release T3 along with a reduction in Levo is what will actually do the trick.
Very interesting indeed. Please keep us posted on your progress, posting results (numbers and lab ranges).