iPhone 4 front camera not working

So I have an iPhone 4 with iOS 7.1.2... The front facing camera has not been working for months now, if not a year. When I go to open the camera app, the rear camera works fine, but when I touch the switch button, the app will freeze. If I try to force quit the app and re-open it, the screen will just be black and still frozen. After I close the app again and wait a long time, then the rear camera will work again. I have dropped my phone a couple of times. There is a small crack on the front screen. Everything works fine though. I have tried many things to get the camera to work, but none of them solved the problem. There is no apple store by Me. If I took it into a phone store, could they fix it?

Here are the things I have tried:

-downloaded a third party camera app

- reset all settings

- restarting the phone

- deleted apps using camera

- hard reset

- Held camera app down while holding down power button and turned off

- Press firmly around camera lens

I do not want to back up everything and reset the phone. If anybody knows how I can get this to work, please let me know. Thanks.