Tired of weight gain

I've been diagnosed with Hypothyroidism for 3 years.

I'm so tired of weight gain and hairloss. I've gained over 45 lbs over a year even though I exercise and eat healthy. I'm on 100mcg of levothyroxine. I'm 160lb at 5'2''. This is the heaviest I've ever been and I'm feeling hopeless.

My labs show with meds my TSH is barely in normal range. I feel horrible and hopeless to the point I don't even wanna try anymore. My doctor just shrugs and says I just need to eat better and exercise more but I'm already doing that.😭

My other labs are mostly normal besides my Ferritin being low.