Someone with a hypothyroid please talk me down or give me advice!

My TSH had just gotten to 2.9 (finally) and bam pregnant! I am thrilled. I had my first lab draw the day I found out and my TSH is already up to 5.9 and I am freaking out. I had a miscarriage before but my tsh then was 10 and I was on no meds at all. My doctor is increasing my dose from 112 MCG to 137 MCG and I’m worried it won’t be enough. She said start the higher dose and check again in 2 weeks which also seems long to me too. I’m so worried. Can anyone shed some light or give me some encouragement ? Any experiences? I want to be happy about this pregnancy but all I am is scared.