Thyroid?

I am 11.5 weeks currently and transferred from the RE to my regular OB last week. My OB office called today and said my thyroid was low from the baseline blood test they did. They want to retest it at my next appt in 3 weeks .

Of course I googled and am now paranoid that it can cause many issues. They didn’t say how low or if it was borderline low. I assume if it was very low they would start me on something right away.

I am going to call in the morning to ask about the level. Can anyone shed some light or advice- thanks!