I want highlights!?

ok, i avoided bleaching my hair during my whole pregnancy because i wasnt sure about the rules with the chemicals and stuff so we just did a peroxide free haircolor close to my natural color to minmize upkeep . Well my beautiful son was born on July 15 and i am ready ready ready for a change! I was thinking of adding some chunky highlights but since i am feeding i am not sure what i can and cant do now. Also i would have to take him with me to the hair appointment and wonder whether i should be concerned with the fumes. I could keep him in his carseat a short distance away and make sure he is fed and content but if he should happen to wake up while i have a head full of chemicals what do i do then? am i doomed to sport this drab head of hair until he can sit with someone else during my appointment?