I am 18 weeks pregnant and hypothyroid tsh gone up to 6.63?

Hello dr. I am 18 weeks pregnant and hypothyroid. Last mnth i got my tsh checked and it was 0.1 and that time i was on a dose of mon to fri 100mcg and sat sun200 mcg. After tsh 0.1 dr. Made it mon to sat 100 and sun 200…now last week my tsh gone up to 6.63 s0 my endocrinologist agn did the dose mon to fri 100 and sat sun 200. While my gynaec says to have 125 mcg daily…whom to follow?