I highlighted my hair in the first trimester-- I didn't know!?

You're fine and so is your baby. I can't figure out why, but for some reason doctors like to make women panic by every other week announcing that some other innocuous thing is going to turn our babies into spider monkeys. "Oh god you dyed your hair!/wore flip flops/touched aluminum foil, your baby's going to have 8 toes and a crazy eye!!" Yeah...not so much. I dye my hair every 6 weeks for the last decade and have 2 perfect children and another due in sept. Don't worry, you're totally fine as long as you do it in a well ventilated area. Good luck