My tsh is on the high side of normal and i take levothyroxine. am i at lower risk for developing thyroid nodules as a result?

No: Tsh tells the thyroid to produce hormone and maintain its structure (or growth). If your TSH is high normal, you are not at lower risk of shrinking any nodule size or developing nodules.

No: Nodules cannot be prevented by levothyroxine, nor can that drug shrink or otherwise change nodules. Nodules occur for other reasons, outside the control of that drug.