Blood test shows low thyroid levels. Dr wants me to take thyroid supplement. I’d prefer non med solution.?

Letter from Dr re: recent bloodwork says, "thyroid levels were low and you would benefit from taking a thydroid supplement. Please call to start med." I don’t want to take meds. I take nothing now and don’t want to start! I am a 57 yr old female, 6 years into menopause. This is first bloodwork in 4 years. I am a runner. No weight problem. Symptoms, if you want to call them that, are: hot flashes, slower/inconsistant running, some insomnia, little interest in sex, mild fatigue. All of which I attributed to menopause. Of course, I’d be happy to have improvement there, but they’re not a big problem.
Just got the letter so haven’t discussed with Dr. what the levels are and how I might benefit from the meds. Looking for info and homeopathic suggestions before I tell him I don’t want to take the meds.