Soy wonly effects thyriod if you already have problems with it. Soy shouldn't effect a healthy thyriod.

I eat soy all the time in various forms. Remember if you only have 7 pounds left, the slower you lose it the more likely it is to stay off. If you lose at the average of 5% a month, that would mean if you even lost .3 pounds the entire month you would be on track.

Also you are a healthy weight for your height and your body fat % is already at the bottom end of the healthy scale for someone between 18-30. If you are over 30, you have already gotten your body fat lower then the normal range and are into the athletic range. Losing more would mean either starvation, or better way, lots and lots of exercise including weights.