TTC #1 with underactive thyroid

Hi guys, has anyone struggled to conceive after being diagnosed UAT? I found out in April this year that I have an underactive thyroid, it seems to be hereditary in my family as my dad and older sister both have it. We have been trying for just over a year and when I went to see the docs in April I also asked if they would run a few blood tests, which she was happy to do, she told me that due to me being 26 and having regular monthly cycles that It should be easy for me. Well when my bloods for the thyroid came back as UAT she told me that my prolactin levels where elevated and that taking my levothyroxine may sort it out. I'm due to have my TFT levels and prolactin levels retested on Monday! Has anyone else had similar issues related to thyroid?