Hello carrie123,
It sounds like the camera stopped working for you all of a sudden, and updating to iOS 7.0.4 did not get it working normally again. I have a couple things to recommend to you. First close all the open apps on the phone.
iOS: Force an app to close
http://support.apple.com/kb/ht5137
Double-click the Home button.
Swipe left or right until you have located the app you wish to close.
Swipe the app up to close it.
When you have done that restart the phone and try again:
iOS: Turning off and on (restarting) and resetting
http://support.apple.com/kb/ht1430
I would next, if the issue persists see if this info helps:
- Ensure the camera lens is clean and free from any obstructions. Use a microfiber polishing cloth to clean the lens.
- Cases can interfere with the camera and the flash. Try gently cleaning the lens with a clean dry cloth or removing the case if you see image or color-quality issues with photos.
From: iPhone Hardware Troubleshooting
http://support.apple.com/kb/ts2802
Thank you for using Apple Support Communities.
Regards,
Sterling