Well, I haven't had surgery but I do have Hashimoto's Autoimmune Thyroiditis & Hypothyroidism.
So I'm going to be on my Levothyroxine for the rest of my life (75mcg) . Wouldn't be without it!
It's a pity, in my case, that it wasn't started sooner as I suffered Hypo symptoms on & off for many years.
I Now have throat, stomach & Bowel conditions as well as other problems with my legs etc. Had I got my Levothyroxine much sooner I may have been spared some of these.
Every cell in the body needs Thyroxine to function properly.
Our bodies just don't work well without it.
I understand it can be frightening starting something new.
You can always posts any worries or concerns on here as you will find a lot of people with genuine understanding Who truly care.
Hope this helps.