Am hypothyroid since july i take 150 mg of synthroid (thyroxine) which is great but still zero energy and little weight loss i go to a gp how do i get energy back?

Consider T3/adrenal: There are many other possible causes of fatigue, but a recent study proved that most people feel better with adding the T3 (liothyronine) form of thyroid. See http://tinyurl.com/hy858nd Many with thyroid problems have adrenal fatigue as well- see https://adrenalfatigue.org But there are many other causes of fatigue. I advise seeing an Integrative doctor for a thorough evaluation.