Start by please posting your thyroid related test results and reference ranges shown on the lab report. Also, tell us about any other symptoms you have. Also, if tested for Vitamin D and ferritin, please post those results as well. What thyroid med are you taking and what dosage?
Please post you recent thyroid labs with reference ranges. We can have a look and see if you are being tested properly and if your meds are adjusted properly.
What meds do you take?
Do you still have other hypo symptoms besides the inability to lose weight?