Yes, the pregnancy of your second child could definitely be the culprit of throwing off your levels again. And that does sound right that it would make your levels high. Do you know what your levels were, and do you know what tests your doc ran? It doesn't sound right though that your doc lowered your med dosage, if anything it seems they should have raised the dosage. I'm sorry your doc gives you vague answers, I'm sure that must be frustrating at times. Can you get a new doctor? There is a sticky on this board on how to find a good thyroid doctor, and I found my doctor off of that website. Also, have you heard of Mary Shomon? She writes a lot about thyroid problems, and she also has a facebook page where she answers questions from "fans." I hope you get some answers soon, and I hope you feel better!