Dying hair?

Chelsea • LRK 5.30.16💖 MGK 7.5.19💙

So I never had my hair colored or dyed or anything until last year when I got caramel highlights and I loved them. A month ago I went to have the highlights done again as it was long past overdue and she left the color on too long and now I have blonde highlights that I can’t stand. I want to fix it but am not sure if it’s safe to dye my hair back to its original color while pregnant? Is it safe? I’ve heard that highlights are safe but not dying. if it’s not safe- any suggestions? I can’t stand it 🙈