Second Missed miscarriage

Hi everybody. I've had 2 missed miscarriages in the past 6 months. Both needed d&c. Just had my surgery yesterday & we found out I'm hypothyroid, that this may be causing my missed miscarriages. My levels are extremely high. I had half of my thyroid removed when I was 9. I'm 21 now. I'm praying & hoping this is the reason & once I get on my medication, we will be able to carry full term. Wish me luck :)