Preconception lab work worried about thyroid.

I'm going for preconception lab work next week so hopefully I can start the road to iui this month. But recently I've started to worry about my thyroid being underactive, I have many of the symptoms. And 5 years ago when I started this journey my thyroid levels were low but still within normal range. I didn't continue the medication because things were put on hold for my husband's medical issues. But as started before I'm worried, I'm worried I won't be able to start iui this month if my thyroid is an issue. Did anyone have hypothyroidism and still able to start fertility treatment with starting thyroid med?