To color hair or not?

Alexis
Hey Ladies,
So I may be pregnant!! I go for bloodwork on Monday. At home tests say positive but I took Ovidrel so that gives false positives. With that said, I have an appointment to get my hair colored on Monday! I've waited forever to get in to get my hair done. Is it safe to color my hair or would you wait? Obviously I don't want to do anything to jeopardize my pregnancy since I've been trying for two years but my greys are horrible!! What should I do?!?