I was about 6 weeks when had to start taking thyroxine, I have Hashimotos like Love My Kids - it was at the point I discovered I was pregnant that I was diagnosed and my levels were really bad (even for a non-pregnant person) so I wasn't as far along as you, and I did worry a bit about whether had, had any affect on bubs - but she turned out fine. I would suspect that as your levels are not that low if they are in the normal range for someone who isn't pregnant that all should be fine. The doctor I saw said mine probably looked so bad because the baby was getting all the hormone I was producing, because I had been tested a few months previously and although levels were a little low they were in the normal range.