Hows your magnesium intake? also a crucial element when it comes to pregnancy et al.
"It is estimated that only 35-58% of pregnant women get enough magnesium in their diet. Magnesium is the “forgotten twin” of calcium, and is essential for bone health, cardiovascular health, placental health, and adequate energy levels. Magnesium is also important for the overall health of your baby: it’s brain, vascular, and bone development." http://www.vibranthealthybaby.com/2010/04/magnesium-and-pregnancy/
Besides iodine, magnesium is the element I know I was really deficient in back then. Add a little boron and real salt, then you dont have to pee all the time; this is a major problem among pregnant women. Not treated; as it is supposed to be "normal".