My iPhone has to be restored but i don't know if my phone is backed up

I tried updating my phone on my computer but then it said I needed to restore my phone. Will my apps/photos be deleted? I plug my phone to my computer and it says "backing up phone" but I don't know if that means it's backed-up. I'm really freaking out Please Help!

You can backup your iPhone data with iTunes manually by following the steps below:
1. Connect your iPhone to a computer with the latest version of iTunes installed.
2. Open the iOS device's Summary tab.
3. Press the "Back Up Now" button.

Learn more about iPhone backup: http://recover-iphone-files.blogspot.com/2013/08/backup-and-restore-iphone-before-factory-reset.html