I'm going to refer you to an endocrinologist so you can get more information along with the medication.
Since you're pregnant, you need a larger dosage, by 20-30% of the normal dosage of Levothroxine in your first trimester. It's simply an oral medication so there is no need to take time of work. The disease may clear up with this medication or be managed by it, meaning you will be on this medication for life.
What happens if I decide against the medication?
You will be prone to seizures, comas, confusion, decreased breathing, low blood oxygen levels, high blood carbon dioxide levels, hypothermia and low blood sodium. The will decrease your quality of life.
ONE YEAR LATER...
I decided to take the medication and I am doing good. I gave birth to a beautiful baby girl and my hypothyroidism has cleared significantly and I am managing it by regularly taking medication.