ultrasound of thyroid results back

this is my second ultrasound of thyroid in 6 months. they compared it to my last one 6 months ago. the endo called me the next day stating my chestnut size nodule grew little from the last one i had. your fna biopsy was normal 6 months ago. i am not concerned, he stated. he told me to bring my ultrasound of thyroid on a cd which was made when i had it done. i see him in 3 weeks. i had radioactiveiodine uptake test 6 months ago too. my tsh levels are ok. i don't know what he is going to say when i see him. what do you all think. has anyone had this situation, what happened, should i be concerned