Dear Priya, you have something called subclinical hypothyroidism . Hypo vitaminosis D is also a common problem worldwide. You have started your efforts for losing weight jus a couple weeks back. So keep patience and stick to your diet and exercise regimen. Avoid temptations of going off the track for your favourite dishes. This sacrifice would be certainly of great help at the end of few months. Thyroid, once it is maitained in normal range, does not contribute to your weight. So do not blame hypothyroidism for your overweight. Having low Vit D an partly because of avoiding Sunlight, the excess bodyfat, very less vitamin D in the diet. But you are on right medications. So just stick to medication and weight loss regime sincerely. You sure will find a difference! All the very best.