Levothyroxine and ttc

I recently found out I have an under active thyroid it is barely considered under active so my dr started me on 25mg levothroxine. I took the first one today I have done some googling lol but was wondering if any other women ttc are on this medication and if so did you notice any changes after you started taking it and if so what also how long did it take to notice? I didn't really think I was symptomatic but now wondering if I will see a difference after taking the medication. Thanks for anyone with any info in advance!