Agree as above mentioned, there are products we can use that have less chemicals in them...but that's a matter of choice for anytime really. If there was a problem with those products being used whilst pregnant then we would all know about it.
Though you may want to change some products you use in regards to the changes that will happen to you whilst pg....for example my skin might break out or get very dry, hair can sometimes become dry also etc. You might want to use products that my help these things. If that makes sense.