Hello, Before trying to conceive, your TSH level should be normal or below 4 mIU/ ml under thyroid medication. Otherwise, it may cause several complication for both mother and baby during pregnancy period. Therefore, you must take thyroid medication and iodized salt in diet to combat thyroid deficiency and pregnancy loss. Do regular physical exercise to reduce body weight and take low carbohydrate diet. Avoid mental stress and continue above medicine. Good luck.