I am 31 weeks pregnant and have an underactive thyroid. I had my routine blood tests done and was called back to the GP yesterday to discuss my results. I saw a locum doctor who told me all my results were fine including thyroid and he couldn't see why I was called back even though my patient notes clearly had Abnormal thyroid in big red letters on the screen, written by another GP. My levels are 4.23. Anyone know if this is within the normal range or had any experience of this. Thinking about asking for a second opinion.