I am 13 weeks pregnant with my second child who is now 2 1/2. I was diognosed with hypothyroidism 6 months after the birth and have so far been fine taking daily thyroxin. I am now expecting again after a miscarriage at 12 weeks and I seem to be chasing my doctor to ensure that my thyroid levels are checked. So far have not received the first results from blood taken at my nuchal scan last week. I am getting worried as I am not sure of the implications of my levels dropping. I am feeling exhausted and beginning to worry that the baby's development may be suffering. Has anyone else been through a pregnancy with this condition. Please help.