Thyroid question??

Slvelaz✨✨ • 👯‍♀️ 1 Ectopic 2 MC 🌈=11/04/19 🤰due10/01/21

They been testing my thyroid since I was 8w it was a little high but leveled out to a normal range. Well yesterday I went back to repeat my draw and the labs came back and it says my thyroid is now 3.49? I'm 18 weeks.. isint my thyroid supposed to be under 3? I know my dr will call if it's high but just wanted to ask here n see if anyone experienced this