I heard that if you use Aveda products they have no amonia and it's okay to use. Wear a mask to be safe. 8-)
I know this is a little late, since your appointment was on the 5th, but just wanted to tell you that my doctor says not to color your hair while pregnant. Take care!
This is something that maybe your Dr. could shed some light on just to be on the safe side. I would definately ask him/her and go by what they say. I too have heard conflicting statements regarding this. My hairdressers opinion is that your hormone levels are just so off the charts that the outcome of the color/perm could be totally opposite of what your intent. Congrats on the pregnancy!