Your thyroid function test is in the normal range. But you have thyroid microsomal antibodies
. This means there might be some sort of auto immunity developing in you. Your thyroid may be in the process of failure. Presence of thyroid microsomal antibodies can cause infertility
or premature births also.
You have told that you got your pregnancy test done. Get your urine hcg values (very sensitive test to detect pregnancy). Consult your gynecologist for confirmation of your pregnancy and at the same time consult an endocrinologist
regarding antibodies. he can further evaluate you and start on medication.