How much hgh are you running a day? I find that if I run over 5iu of hgh per day I will have low t4 so I take 50mcg-75mcg of t4 per day to raise it back up. You will need to do several tests to dial it in for you because everyone is different you may need less or more t4. However your levels are pretty close to normal so you might not need to do anything.
But definitely wait to hear back from your doctor before you do anything