I have a different email for my iMessage and FaceTime how do I change that

Hey BriaBarton,

Thank you for using Apple Support Communities!

I understand from your post that you need to change your Apple ID in your messages settings on your iOS device. I'd be happy to help out.

I'd recommend using the steps here to sign out of iMessage with your current Apple ID and sign in with your desired Apple ID:

Set up Messages on iPhone - Apple Support

Cheers!