Hello, My Mom Had A Thyroid Surgery Two Years Ago,

Hello,
My mom had a thyroid surgery two years ago, but since then things are getting pretty bad, before having this surgery she was had diabetes, this week she had an Hba1c with 10.89%, with a 98 SGOT, clinically she is always tired (she can't even go upstairs without resting many times) she sleeps more than 12 hours a day, her TSH was about 3.88, when I asked her endocrinologist she says that TSH is normal, but she wasn't sure if the Hba1c level explain what she suffers from? please need your help,