how did you fix your phone?? mine is doing the same thing
connect your phone to iTunes
hold the sleep/wake button (on the top of your phone) and the home button for 10 seconds (if you see the apple logo you held it too long and will have to try again)
let go of only the sleep/wake button and keep holding the home button for 5 seconds
if your screen stays black and iTunes says that it’s detected a phone in recovery mode then you did it correctly and you just click ok to restore your phone :))












