iPhone disaster!!! PLEASE HELP!!!?

Hi,
I have been wanting to purchase several Apps from the App Store on my iPhone, but it said that I needed to update my phone. I used someone elses computer, who had an iPhone already on the iTunes account. I went into the iTunes store, and it asked if I want to restore my phone. I clicked "OK," not thinking that it would take off ALL 1456 photos from my phone. The applications, contacts, text messages and photos that went with the contacts, along with all of my personalized settings ARE still there. I'm confused on why it took off all of my photos, but nothing else. I right clicked on my device in iTunes and one of the options is "Restore From Backup." Is this a good option for me? What will happen to my phone if I click "Restore From Backup." I don't want to mess up the other person's iTunes or their iPhone. PLEASE HELP!!!
IF YOU KNOW HOW TO GET MY PHOTOS BACK IT WOULD BE MUCH APPRECIATED!!! :D
 
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