thanks for your comments!
graveslady, so do you mean you never even felt horny before your thirties? and did that situation magically change when you reached your thirties?
Maybe you are a late bloomer - see what your thirties brings. That is when I bloomed and I'm still blooming.
There is no magic to weight issues, even for people with no thyroid condition. We are a food loving society, mostly fast foods.
The best we can do is exercise, find a few diets that best fits us, ones with a maintenance program, because this will probably be a lifetime situation, and alternate between them.
"Eat to live, not live to eat".
Good luck!
It could be related to your thyroid since thyroid and estrogen affect each other. I'd find a really good OB/GYN and discuss all of this with him/her. You may have other hormonal issues going on.