thyroid problems

Anyone else struggle with thyroid problems? My doctor just called me and said mine came back 6.64, which is higher than it was before they put me on synthroid. I had a MC in Dec, (my levels then were 4.8) and I'm afraid it was bc of my thyroid levels. We are currently ttc and I'm just freaking out thinking this will be a constant battle now. :( Any positive outcomes? I'm getting referred to an endocrinologist so that's good news I guess, to get it under control.