I am not able to help because I have not really learned the details about TSH. My thyroid was removed because of cancerous nodules and I am on throid medicine for the rest of my life. My endocrinologist kept saying my one number must remain low so I don't get more cancer, but I know I can't get more cancer in a thyroid that has been removed. Keep asking your doctor your questions. I have low energy and fight it daily but doctors insist it is because of the diabetes which I manage quite well. My blood sugar is between 100 and 115 every morning. I only take one metformin at night and I am thinking I can quit that if I am more active, depending on my bad back. Basically I do not "doctor" my chronic issues but concentrate on diet and exercise. I wish I slept better at age 86. I am working on it.
Dorisena

@amandajro and @abeera
I just looked back as far as I could in numerous portals to see what my TSH was prior to being on medication and I can't find that - I was able to go back to 2012. I've been on the medication for quite a while. Now when I see my endocrinologist he says my numbers are "spot on"

I am on what I think is the smallest possible dose of levothyroxine and it does what I need. It was a slightly higher dose but apparently my number has improved.

I wish I could be more help but that's all I have. I must say too, of all the medications I take, this one is one of the few that is totally non-problematic.
JK