Can I dye my hair?

I’m 23 weeks and my hair looks awful! My roots are about 3 inches out, then red, and then the ends are purple 🙄 I’ve lived with it but my baby shower is in a few weeks and I don’t want the pictures looking crazy. I found ammonia free hair dye, can I use it? I’ve heard myths about dying hair while pregnant and then I know some mamas who colored their hair every other week. I just want to make sure I’m not harming myself or him by doing it.