I'm no expert in t3 but I do know this the reason I don't mess with it is cuz u can fry ur thyroid and that's not a risk I wanna take
What u need to do is get multiple thyroid tests because ur t3 and t4 do fluctuate
As of how long it will take for u to recover that's is individual dependent if ever it's the risk you take like stated above ..
I have had three thyroid tests two come back off and one came back good I go again the first of next month to see if it's acting up again..
Pray to God it's not because that hormone is a bitch to get right
Why are u concerned with ur bloods ? Do u feel any different or notice weight loss or weight gain ?