Hypothyroidism in 1st trimester

Hoping to find others dealing with same experience.  
I'm 6w 1day and have just been diagnosed with subclinical hypothyroidism and required to take levothyroxine to supplement my under active thyroid. 
Looks like having a poorly functioning thyroid can be dangerous to the baby and myself.  
Anyone ever diagnosed during early pregnancy? How did you tolerate the medications ? Did you need to continue meds after baby born?