Hi - I'm 29 weeks pregnant and wondered if anyone might be able to help shed any light on my strange thyroid blood test results please. I have great trouble taking levothyroxine because of suspected intolerance to the fillers in the tablets and equally had trouble taking a liquid form, however I have a wonderful endocrinologist and GP and am now taking Tirosint which is sourced from the US. I have a low BMI generally and few symptoms of hypothyroidism and for the first part of my pregnancy I was taking only 25 micrograms every other day of levothyroxine, although this was increased two months ago to 25 micrograms per day. My free T4 has gradually been falling and is now just under 10, but my TSH has also been decreasing and has gone from 3.2 to 1.7 over the past months. My free T3 has hovered around 3.5 but since increasing my dosage has suddenly leapt from 3.5 to 5.6 in only 6 weeks. I seem to be very sensitive to dose changes and have been in the past but as I'm pregnant at the moment I'm particularly anxious about the results given my free T4 is still travelling downwards, which would imply my Tirosint needs increasing, and yet the free T3 has suddenly shot up. I do have a brilliant endocrinologist but he is away at the moment and I would be grateful to know if anyone else has been in this situation or can shed any light on this situation for me please. I also have a constant dilemma of whether to take iodine given I have Hashimoto's, I know the baby needs iodine (and I am intolerant to eggs and lactose, as well as now being coeliac as of last year when I was very poorly) but read so many contradictory reports. Thank you.