you have to wait at least 12h after taking your thyroid meds.. because you will do your bloodwork when the meds have a peak in your blood.. = "false" results.. You have plenty of room to up your dose more..in fT4.. especially if you have symptoms.. and YES.. the fT3 is fluctating.. i have that too with my NDT (Acella).. when i up my dose too fast.. the fT3 is high first, aroung 100%.. if i hold my dose the fT3 will drop because your body get used to it.. watch out for labs and symptoms.. go your way, listen to your body
It was always my understanding you should either get blood labs in the morning *before* taking anything with T3 (Armour, NatureThroid, Efra, Cytomel if one does the levo/Cytomel combo like I do) or wait 4 hours (or a bit more) after taking anything with T3 after it hits it's peak as to not skew the FT3 results because it will increase your FT3 while it's still circulating in your system and not show what your actual FT3 level really is. I'm not sure how entirely true this is, but I always do my labs in the a.m. before taking my Cytomel just to make sure any T3 labs I get aren't a result of being temporarily ramped up by taking the T3 med just to be on the safe side.
I think it's okay to increase your dose. I agree with your doctor...your FT3 was close to range, and it's inflated. Another thing you might consider after your next labs if symptoms persist is adding a little synthetic T4 to your Armour to nudge your FT4 up just a little bit.