Hello and thank you for asking!
I have gone carefully through your concern.
Regarding to TSH level
you need to check it once in 6 months if thyroid antibodies
(antiTPO or antiTg ) are high. It means that during the life the thyroid function will get lower and TSH needs to be monitored.
The nodules you described may shrink if they have cystic component, of they are solid, the chances to shrink are low.
Hope i have answered your query.