there’s a group on facebook called thyroid group UK, ive found it very helpful in terms of learning more about hypo and finding a eating plan which works for me. It’s not just calorie deficit it’s other things as well, you will need to make changes to your diet such as low carb, low sugar etc. I joined slimming world recently because a lot of people on the facebook group with hypo said it worked for them, ive been losing weight since i started it! Do give it a try if you can afford it! If it doesn’t work then it’s worth going to the doctor again and mentioning this because then they might adjust your medication dose. I spoke to someone on there who did slimming world, she was hypo but didn’t see any changes to her weight in the first 10 weeks, went to the doctor and told them about it and they referred her to an endo who then adjusted her meds.