I can’t open my camera roll

Whenever I try to open Photos, there’s just a blank loading screen for a few minutes and then it exits back to the home screen. I started having problems a few days earlier while I was trying to clean out my camera roll. Whenever I tried to delete a photo it would delete but then a random blank space would appear where that photo used to be. Then the next day I would select photos to delete and they’d go away for a few seconds but then come right back while still being selected. I decided to shut off my iphone and turn it back on to see if those photos would be gone then, but now i can’t open Photos at all and I can’t open them on other apps either. What should I do?