Thyroid problems

Does anyone else have thyroid problems and pregnant?
I've had low thyroid my whole life and they found out when I was 5 years old. I have been on medicine ever since. This is my first pregnancy. I am 12 weeks today and they have checked me thyroid a couple times but I'm still worried about what's going on and what's going to happen with the baby and if he/she will also have low thyroid.