craving dove soap

So I'm 7 months pregnant and for the past couple of weeks I've been craving the smell and taste of dove soap (yes I know it's pica) I don't eat the bars of soaps just the soapy suds when I wash my hands or body. I have sickle cell anemia the trait . So I'm on iron pills plus my regular prenatal, however I'm still craving the soap not in excessive like before though, (Docter says give it some time the cravings should stop after about a week) 
my question is how can this effect my baby? I've been looking it up online and haven't had any luck into finding out anything resourceful.
Will my child come out mentally challenged ?