I just wanted to say that I have Hashimoto's too. I was diagnosed after the birth of my first baby who is now 15 months old. I had pp thyroiditis, was hyper, then hypo and remain hypo. My thyroid peroxidase antiboides are over 4000 !!!
I am also just shy of 24 weeks pregnant! I am being treated by an ob and medical consultant and they are taking my bloods every 6 weeks since 20 weeks and before that every month. I am have had my levels upped several times already..but all seems to be going well!
I was sooo scared of miscarrigae, but all the info I read stated that if you are controlled your risk is only slightly elevated, and also that infertility patients (those who need assisted conception) seem to be the ones who high thyroid antibodies affect the pregnancies the most. Also the studies were in women who had no overt disease, so it may be that they had subclinical thyroid disease which was causing the miscarriages.
BEST wishes, hang in there!!!