I've had my hair bleached this last trimester so it can't be worse than that:)
Just use lemon juice mixed with water in a spray bottle. Natural and works like sun in
Never use sun in the ingredients in there torch the hair (take it from a licensed cosmetologist) talk to your doctor about whether or not it's safe to color your hair and if so go to a reputable salon and ask for a heavy hi - lite. There is no on scalp application so you should be fine (Google sun in and take witness to some of the horror stories)