Iphone 4 keeps trying to turn on, but goes to a circle looking loading screen?

Two days ago, I was trying to erase some pictures on my phone, because my memory was almost full, and it shut down. Then, the apple logo turned on like it was turning back on but instead the screen went black and had a tiny white circular loading screen in the center. It has been doing this ever since. The apple screen will appear and then the loading screen. It doesn't stop until it's dead, and I charge it again? Has this happened to anyone else? I can't get it looked at until saturday? What can I do?

You can try resetting the phone.although everything will be deleted.

Or keep it on a charger while you're doing your thing.

Sounds like it's stuck in boot-up. I know more about androids though, so I can't answer about what to do to try to fix it. Google it though. I've actually fixed computers, cleared viruses, and fixed a few phones all from information I learned from a few Google searches.