Brazilian keratin while pregnant

Does anyone know if it's safe? I've been doing my own hair for over 4 years and I do an excellent job and always love my results my hair does not fall out and I do  not have cancer for those of you that are gonna tell me those things. I'm 20 weeks 5 days pregnant and I haven't done a keratin since before the pregnancy and I need one!! Lol so I'm wondering if any of you have asked and happen to know if it's safe. I could call my dr but they out me on hold for hours and have no patience right now thanks.