We had a problem with Toto losing hair unnaturally .... she was allergic to a dye in new carpet we just had installed. Vet gave her a couple of meds, instructed us to get new carpet cleaned and she's been fine ever since. I was shocked that could cause it but thankful it wasn't anything more serious! Also thankful that Patrick didn't rip out the carpet with his bare hands, which was what he wanted to do!
[BTW, her thyroid was fine.] Hope your baby will be fine ... please keep us updated.