Are my iPhone photos recoverable?

Here’s the situation. I got my new iPhone 6s Plus Friday night. Prior to that I backed up my iPhone 6 onto iTunes. The next morning I took my new phone to work to shoot pictures for an event. I was so tired and went straight to watching my son by myself afterwork but also had other tasks to do. I woke up from a nap and went directly to “restore” my new phone with the data I backed up with iTunes previously on the iPhone 6 but before I restored phone I “updated carrier settings” whatever that was (I think it was iOS 9.0.1)

When I hooked my new phone up to iTunes it gave me options of which date to restore from I selected [iPhone3] which was the identity of my iPhone 6.

I don’t know why but I assumed my texts messages and photos would just be added along once I ‘restored’ what a fool I am! So I lost my text message contacts that I made that day as well as the photos and videos I took that day. Again let me reiterate I didn’t manually “delete” photos so there is no “Recently Deleted Photos” with the stuff I’m looking for.

Any advice how to get them back?