Nothing wrong with relaxing while pregnant.
Regarding the chemical exposure etc.., millions of women relax their hair in many different countries with no problems whatsoever. Many of the children born in those countries are not hitting puberty early like the children here in America. There are chemical exposures in this country that are affecting us and our children and it has nothing to do with relaxers.
Case in point..., I have relatives that relocate to this country who were healthy and skinny. In no time they get so big and bloated up.., people are always asking me, OMG, what are you feeding them in America??? They are injecting our foods with all kinds of chemicals..., it's hard to know what is truly fresh and pure to consume. I am natural, but I hate it when people blame relaxers for this or that, when they are literally killing themselves with other stuff and don't even know it.