Restoring an iPhone from a backup can help you recover your data easily. You usually do this by going into Settings, tapping General, and selecting Reset; then choose "Erase All Content and Settings." During the setup process, choose "Restore from iCloud Backup" or use iTunes/Finder on a computer for a local backup. Do you have a recent backup ready, or are you looking to set up regular backups too? I'm here if you want more details or have any concerns.