Hello @ortiz518, welcome to the community! Your query was translated to English since this is a international forum.
I'm sorry to hear about your phones unexpected behaviour. Is this something that you have experienced for a longer period or is it something that has started recently?
To start with, I'd recommend that you restart your phone in safe mode just to make sure that no third party application is interacting with the phone and making it shut down, as they are temporairly disabled while the device is rebooted in safe mode. You can still use the standard functions such as making phone calls, send and receive text messages.
If there is no change in safe mode, you could also perform a software repair using Xperia Companion. A software repair will remove all software in your phone and reinstall the latest available version, so make sure that you do a backup using Xperia Companion before you start, so you can keep your data.
Keep me updated, and have a nice day!
