Hyperthyroidism and pregnant — can this cause a miscarriage?

Liz

I had my first prenatal exam this past week and I’m currently 8 weeks 3 days pregnant. I received a call yesterday saying I have an overactive thyroid. They referred me to an endocrinologist whom I don’t see until November 3rd. My TSH level is 0.153. How likely is it for me to have a miscarriage at this point? Now I’m wondering if my shortness of breath and extreme fatigue is actually morning sickness or that my thyroid is overactive :-( very concerned for my baby more than anything!