Hi Respected Sir / Madam Iam A Thyroid Patient By

Hi respected sir / madam iam a thyroid patient by birth. iam taking eltroxin from 3rd month baby and still iam continuing. Now my age is 27 yrs . I want a valuable information from u if my pregñancy is confirmed with in how many days i will take thyroid test & to increase the dosage for my healthy growing feutus without any disnormalities in order to avoid missed abortion