Please don’t stress over this- we weren’t born knowing this stuff & you have done the best you can by Akria with the knowledge you have. Now is the time to move a few steps forward with the knowledge & support you are about to gain..
A reasonable taper off for the Thyrol l would be at 75% of original dose for 2 weeks, then 50%, then 25% then off. I have asked for the team to jump in regarding when/how to retest.
Next move is to start filling out a case history for her- with previous (& when available- new) blood test results, plus the other information required on the form. That way we can be more specific in how we approach her care. If you need a hand with the case hx form- let me know.