Ur fine ive always had my hair done . both pregnancy (i change my color alot)
Ive always done my hair hole pregnant even bleached. As long as your in a big room and not trapped with it you'll be fine.
I have been told as long as it is done in a well ventilated room you can dye your hair after your first trimester (but not bleach it) bc every pregnancy is different make sure to clear it with your Dr first but it shouldn't be a problem