I had the reverse.
I had RAI first because of thyroid storms then 3 days prior to RAI..cancer of the whole thyroid was found.
A TT done 3 months after RAI.
My TSH was 0.50 when RAI was given and my FT3 was off the planet.(Graves)
So mine was a different ballgame.
But I was warned that the RAI may not take so was given anti-thyroid meds right up until 3 days before RAI and TSH was still 0.50.
Your TSH is at a good level for RAI.
Mine was 64. Ummm....hmmmm. Drs told me I could live without my thryroid and meds easily for 3 to 4 weeks. My TT was March 25, my RAI was April 17 09, and I really felt like I was doing ok....I just kept doing what I always did. I was tired. But I was ok.
Mine was 186. My sister's was 44.