If you experience skin/hair problems during pregnancy it could be due to a deficiency in Omega fatty acids. You might want to take flax, cod liver, borage, and olive oils if you don't already. The American diet is notorious for being horribly deficient in Omega oils.
If you are experiencing leg cramps or just muscle cramping in general it's usually a sign of a calcium/magnesium deficiency. My midwife advised me to take calcium citrate (since calcium carbonate is pretty much unabsorbable) and magnesium.
Let's see what is this pregnancy doing to my body- well the morning sickness is so bad it wakes me up every morning at 7am no matter what time I went to sleep or what I ate before bed. I have to pee so bad every morning that I don't know whether to puke first and take a chance on peeing myself or pee first and take the chance of puking all over the place.

yeah and my face broke out horribly for the first time in years.