A few days later, I pick up my phone, and just for fun I snap a couple pictures of my room. The first picture took a long time to take (as usual), but the subsequent shots were snapped extremely quickly.. unusually so. So I hit the button at the bottom left side of the camera screen, and the "camera roll" is pulled up, but instead of the pictures that I took, there are empty white squares. When I clicked one of them, it took me back to the home screen. I went into "photos" and "camera roll" was empty. It said "You can take photos using the camera."
It somehow lost the ability to take a photo and keep it. Those white squares show that it has some sort of idea of what it was supposed to do, but it doesn't actually save the picture or something.
First, I turned the phone off and turned it back on. No change.
Then, I reset the phone. No change.
Then, I plugged it into my computer and restored it. No change.