Coloring hair??

Maria • I`m happily married, & I am a new mommy to a beautiful baby boy & with my new little girl. My life is now complete 💚💜
When is it a good time to go get your hair done? I'm dying to get my hair redone. I colored it red before I knew I was pregnant & now it's turning light orange with blond highlights for some reason. My sister does my hair since she is a hairstylist & she also wants to color my hair but into a more neutral color. People tell me to wait to be at least 20 weeks but some people say I can do it now since I am 17 weeks & 3 days