Fellow prego hairstylists?

Diane
This is my first pregnancy, and I'm being overly paranoid about everything. I'm a hairstylist, working 50+ hours a week in the salon. I'm only about 5 weeks pregnant at this point and would like to make sure I'm doing this right! 
Any of my fellow hairstylists have advice on products to stay away from, tips to protect from harmful fumes, etc? 
Any experience with taking time off of work, referring clients to other stylists, etc? I am planning on going back to work after baby is born, I just don't know how to go about the process.