I am in 5th month pregnancy. I had normal TSH before conceiving and doctor did not repeat TSH after getting pregnant. I got it checked myself in 21st week of pregnancy and found that tsh was 5.09 which is above normal. Now doctor has prescribed me thyronorm 25mg. I am worried if I have got diagnosed late. Does it affect the baby. anomaly scan and development has been normal so far. I was also having erythema nodosum. No new rashes currently. My blood works have come ok. HB is slightly reduced. ESR was 86 and after 2 weeks it dropped to 30, wbc is 13k. Can pregnancy cause erythema nodosum? I had a very mild condition which went without treatment.