I bleach my hair, I promise, you'll be fine
My moms a cosmetologist and says its compleatly fine to die your hair wile pregnant as long as your in a well ventilated aria... Ive died my hair at begining of my pregnancy and will be doing it again in a few weeks
You can use any die just be carefull as might not take as well as you wish
I'm 34 weeks and I've gotten my hair professionally dyed twice.once in the beginning and once a week ago.. Haven't had any trouble.
Only ammonia free hair dye, and do it in a week ventilated room, the fumes is what you want to avoid