Do you think the pneumonia was related to the
Cytomel? Why were you taken off the
Cytomel? If FT4 levels are too high and FT3 levels are too low, you are still going to feel hypo since T3 is what your cells can use.
If your doctor has recommended trying selenium, I think I'd follow his suggestions. However, I also think you need to add Cytomel back into your meds, which may necessitate your dropping your Levoxyl a bit at the same time.