Accidentally clicked restore backup instead of backup! Can I still recover my recent photos?
Your photos are probably gone from your phone, but there are a couple other places to check.

Were you backing up to iCloud? If so, you may be able to restore a backup from iCloud to your phone and with it your camera roll. Apple KB article PH12521.

Were you syncing your photostream to iCloud? If so, fire up iPhoto or the windows iCloud tool and download the photos. Apple KB article PH13693.