Katie - I went through the same thing worrying about body lotion, hair dye, even shampoos! Some people will tell you to avoid anything with petrochemicals, which doesn't leave much in the way of skin or hair care, but others will say whatever you usually use is fine. In the end I did get my hair dyed and kept using my usual products, and my baby is slightly larger than normal for my stage, so I guess there's no worries! My philosophy is that if my body doesn't have a bad reaction to it then neither should the baby. I would be worried though if you had extra sensistive skin or sense of smell at the moment, just as this could cause you discomfort.