IPhone 4 camera doesn't want to save pics?

I have an 8 GB iPhone 4 iOS 6 (I don't want to get iOS 7).It's flashed to another provider which doesn't allow me to turn the phone off but the original is Sprint. I ran out of space on my phone so I decided to upload my pics to iCloud and I also transferred them to my laptop since i know iCloud is still kinda risky, and then deleted them from my phone. Now my phone doesn't wanna save the pictures to the camera roll. The camera works fine, I can open it from the home screen icon, texts, and Instagram but the pictures don't save. The only way I can probably see the pictures is through the preview option when the camera is open. Screenshots don't save either. I've looked everywhere for options on how to fix it but can't find anything. I use my camera a lot and I really want to get this fixed. Can anyone help me out? I need to get this fixed As soon as possible.

Your best bet may be taking it to apple and having their genius team take a look at it. They would be the best people to give you an answer about that, and they would probably fix it for you on the spot too.