People with hypothyroidism please answer-- can this be controled by iodine supplements?

My TSH is 8.51 and my T-4 (free) is 1.1. my doctor wants me to take another test in 3 months to monitor it. if it goes to 10 she is going to put me on medication. she said it could be caused by a viral and temporary. how do you know if it is permanent or temporary?? i don't have a family history of this and i don't really have any symptoms of hypothroidism yet especially since i'm usually hot and not cold. my weight is stable and i don't lose hair anymore than normal. is there anything i can change in my diet to help this (iodine, etC)? any info would be appreciated! I'm thinking of taking iodine supplements but want to know if it will help or not. also can this be temporary if caused by a viral infection?