Hair dye

Mary • Married 5/26/12. Police wife. Emergency room RN.
Hi ladies!! So I'm 4w3d with my projected due date as April 23, 2016. I go for my first baby appointment on sept 17 and my first official ultrasound will be sept 24. I found out yesterday... But I have an appointment to get my hair dyed and cut which I made before I found out I was pregnant. Should I stay away from the dye?? I have read so much conflicting info online... And I was gonna cal my ob but they are closed and I'll wait until tomorrow.. Til then I'm picking the brains of you wonderful ladies 😊