Laura1970 and laughlin1947 - I'd encourage you to consider endocrine consult, if TSH is "slightly high" and dose increase is considered or before starting levothyroxine in someone over 60 years old. My understanding is in older adults to be cautious of adjusting levothyroxine doses based on laboratory tests. In particular, it may be incorrect to increase levothyroxine dose if TSH is slightly elevated, the laboratory ranges may not apply and patient comorbidities will be factored in by the endocrinologist and your primary doctor.
https://www.thyroid.org/patient-thyroid-information/ct-for-patients/feb
This link might not work for you. Another way to get at the information about elderly and over prescription of levothyroxine would be a search of terms levothyroxine + elderly + Mayo Clinic research, and you should get a good review of the cautionary aspects of Thyroid laboratory tests and older patients. Apparently this is an example where it is best to have a well informed clinician treat the patient and not rely on the laboratory tests alone! 🙂

Levothyroxine can cause insomnia and anxiety, among many potential adverse effects.

To circle back, I think we earlier agreed a good review might be helpful if a complicated list of medicines is being used.
Perhaps the team clinical pharmacist to start, maybe a sleep specialist and/or endocrinologist?

Best wishes