Q: Somehow my daughter's phone info is now on my phone, I lost all of my information

yes u can always add back device to your apple account by signing them back with ur apple id you can go icloud in setting and sign in again and be sure to check if family sharing is available to not and this might solve ur problem

76jorgerios wrote:

I now have my daughter's info on my phone.  I lost everything on my phone with her information.  How could this have happened?  Can I change this?  Trying to fix it it, I think I did more nonsence, I deleted devices off my apple account.  Can I add the devices back on the account again?

I don't know how the above happened as I have no idea what you did prior to the change.

Are you both using the same Apple ID? If so, best to use separate IDs and set up Family Sharing.

Set up Family Sharing - Apple Support

If you have an iCloud or iTunes backup made prior to the change, you can restore your phone and regain your own data. If you have no backup then it is too late, you may have to reset your phone from scratch as new. This may help:

How to erase your iOS device and then set it up as a new device or restore it from backups - Apple Support