Thyroid in pregnency..?

Any one had Thyroid during pregnency?? Im 6 weeks pregnent & yesterday doctor said i have Thyroid (not high). Im so scared.. as per the Doctor it effects to unburn baby’s brain..
Please share with me if any one had Thyriod during there pregnency..& how its effected to childs. Is there any home remedies are there to reduce this…
Please help Im so worried..
Thanks to all who is writting for me..