Bleaching my hair. calling all hair dressers

I've heard very conflicting things about dying your hair while pregnant. I just got my BFP and I have an appointment on the 4th of next month to go purple. I'm actually not planning on canceling it. I was just wondering if anyone else had bleached and dyed their hair in the first trimester? I dyed my hair in my last pregnancies but I'm just curious other peoples takes on it