I accidentally got my phone stuck on Bootloader Mode

I accidentally got my phone stuck on the screen with the options of Restart Bootloader, Unlock bootloader [Disallowed], Recovery mode, wipe user data, and Power off. I don't know what to do since I'm entirely new to android phones and do not have experience with this screen. I want to get to my regular phone mode with all my apps but I don't know what any of these choices mean.