I second the keto diet.

2 years ago, I was at the gym 5 times a week and very active on the weekends. 5'0" 115lbs give or take, 30 years old.

Then I gained 40lbs in a year, couldn't get out of bed for work, and felt like death warmed over. Got a referral to an endo who immediately put me on 50mcg synthroid, metformin, and victoza. Food choices made me sick constantly until I learned to work with my meds. I dropped 20 or so pounds from meds and no exercise. I still didn't feel that great and felt sluggish all the time.

6 months ago, I started cutting out sugar. 3 months ago, I went full keto. I'm down to 108lbs, I finally want to start working out again, I have energy to walk my dogs, I'm not getting Hashi symptoms all the time and my dose was reduced to 25mcg. I've quit taking metformin and I've almost tapered off victoza.