I have thyroid.. :( and read the article below about difficulty to lose weight. And I'm on daily medication for my thyroid..
Rule out any medical conditions. While thyroid problems are rare, they can definitely make weight loss difficult. There can also be medications you're taking that could affect your body's ability to lose weight. If you feel your food intake is reasonable and you've given your body enough time to see results and haven't seen any (or are seeing unexplainable weight gain) see your doctor to rule any other causes.