Hypothyroidism

I found out I'm pregnant on Wednesday. I was trilled still am. However, I had some blood work done last week I got the results yesterday and it turns out that my tsh levels are at 11.4 😩 it shouldn't go above 2.5 during first trimester. I had an appointment with obgyn yesterday and he prescribed me some medication and I have an appointment with an endocrinologist next Friday. I'm terrified because it can cause miscarriage and birth defects. Does anyone have any experience with this. Or any tips. I've been trying to stay calm but it has been difficult.