Thyroid levels and infertility?

Nicole
So we recently changed clinics and doctors after a frustrating 9 months at another clinic and the first thing they tested were my Thryoid levels.  Mine came back at a 3.1 which is in the normal range but they stated anything over 2.5 was a concern for infertility.  I'm on thyroid medication now but Has anyone else had infertility issues due to their Thryoid levels?  Then any luck finally conceiving once getting their levels under control?  Thanks!