iPhone 6 White Screen, Can't Restore from MacBook Pro

My iPhone 6 was working just fine this morning and even let me add ringtones onto it. However, I recently opened Instagram and then the phone started to act slow. The volume panel got stuck onto the screen and then my whole screen went white. I can't restore from my computer because it always tell me to change the Find My iPhone settings from my phone, which I can't do because of the all-white screen. Despite the stillness of the screen, it makes the lock and screenshot noise. I got my phone in late February and I recently updated it about a week ago. I really need to use my phone because of school and appointments. Is there anything I can do to make the screen work? I haven't dropped it, let it near water or had it 'jail broken'.