I have had mine coloured twice since i found out I was expecting, once at 6 weeks once at 10 and half! I was worried and spoke to my hairdresser (who fortunately is mobile), she said I might be a little sensitive to the dye/bleach, and constantly asked me if my scalp felt ok! I had no problems what so ever!
I don't even dye my hair let alone bleach don't do it!!!! It's not safe
Is bleach okay too if in a well ventilated area or no?
As long as your past your first trimester and you're in a well vintilated area you will be fine
Yeah if you have blonde hair I'd deff suggest a salon. I use box dye but my hair is light brown. Box dye always works for me but I'd be too nervous if I were blonde. I haven't touched my hair since I found out I was pregnant and I'm not going to just because when I do dye my hair, I dye it blonde and I don't think bleach is safe during pregnancy.
Some people go to the salon and some use box hair dye. I would recommend you go to the salon since your hair is blonde. Even if the smells are strong they still keep it ventilated enough to where it shouldn't affect you or baby.