I was slightly hypo. Make sure that you go see a specialist and not a regular dr - an endocrinologist who recognizes that the tsh scale is .3-3, not .5-5. Otherwise, if you are slightly hypo, you won't fall in the treatable numbers. I was nearly 5 on the scale and my endo put me on synthroid. Also realize that this is not an exact science - if you're treatable you'll start out on an amount that might be under what you need. You'll be adjusted upwards based on blood draws.
I was unable to lose weight before and have managed to lose a few since being treated. Good luck.