7days baby boy TSH 13. 97 uIU/ml is

Hi, Baby boy late preterm 36 weeks, PIH with abnormal Doppler, GDM, Hypothyroidism. I was taking 50 mcg during pregnancy. Baby boy weight 2.1kg born on 15 Nov 2022... Baby cried immediately after birth. Apgar scores 8/10 at 1 min and 9/10 at 5 mins. Baby was stable and  shifted to mother... Mother and baby both O+ blood group. 48 hours Bilirubin reports: Total Bilirubin 9.5 mg/dl, Conjugated Bilirubin 0.1 mg/dl, Unconjugated Bilirubin 9.4 mg/dl. 4 day midnight  Bilirubin reports: Bilirubin total 16.4 mg/dl, Direct reacting Bilirubin 0.4 mg/dl, indirect Bilirubin 16.0 mg/dL. 5 day admitted in hospital for Photo therepy (Blue light) 24 hours. Day 6, Total Bilirubin 10.0 mg/dl, Conjugated Bilirubin 0.1 mg/dl, Unconjugated Bilirubin 9.9 mg/dl. Discharged from hospital. Day 7 Thyroid function test serum. T3 131.5 ng/dl, T4 10.85 ng/dl, TSH 13.97 uIU/ml. Is the TSH very high? Is this a side effects of any of the above mentioned? Will it subside on its own or need to take medication