this happened to mine a year ago. I tried it all and mine was stuck on the exact page. Finally I went to Verizon and told them my iPhone was broken and stuck on a screen. Then they did this: Have you tried:
Press and hold the volume down and on/off button simultaneously for ten seconds. Release the on/off button; hold volume down for ten seconds. If your screen is blank, your iPhone is in DFU mode.
if you see it’s in DFU mode I think it’s too late and pics might be gone. Believe me I had a iPhone that I couldn’t turn on since the battery charging port was ruined so I couldn’t charge my iPhone. But thankfully now there are wireless chargers. I hope you get your pics back! So sorry!
THIS worked for me when the Verizon rep did it. Guess it happens often to iPhones just a computer system thing which seems to happen when your phone is too full of data such as downloaded music, movies and photos too.