My iphone won't work? White screen?

I dropped it once and the screen turned really bright, but i could still use it. I accidently dropped it again and know the screen is all white?! Its not broken tho. Its about 5 months old, what should i do?

Just long press the power button and home button at the same till the screen turn off. Your iPhone will reset after few settings by it self. It will surely works if your screen is not broken. But if your iPhone will still not work properly than sadly your screen is broken…

Thank you so much for the Help it's working again