This is true dear. Some people tend to assume some things. Which might later be regrettable. In your case I am sorry for that long time trying to conceive. I know of some few friends who have been going through hypothyroidism. If your weight was one of the reasons that it had a great effect on your fertility. Then you should start working out to reduce the extra kilos. As you have said that fortunately you have managed to lose 20 kilos. That is so good of you. IU can understand how hard it is. But since you have managed to throw away the extra kilos. It is time to work on your hormones level. I am certain that the doctor gave you ways in which it will be helpful. All you have to do is do what you are being told. I believe that sooner things will work out.