I am having this problem currently (and it is almost 5am and many tears have been shed). I noticed a few days ago--12/7/16--while taking videos of my dog, the video simply stopped filming but didn't make the sound like it had ended, and my storage wasn't full (I don't think). The video appeared as a blank white screen, then loaded and at the end, it cut off before the video was finished. This is when I started worrying about my phone.
Tonight, my photos simply disappeared. My phone started running really slowly (swiping between screens, opening apps, etc.) and a black screen with a loading wheel appeared, then the lock screen passcode screen with the keypad showed up. I turned on my phone, opened photos, and it said there were 0 photos. Eventually they started loading, and it kept shutting off again, but if I was patient, they got very close to loading up to recent months, but mind you I have 11k+ photos/videos on my phone, and I only noticed it load around 8k before it quit out. Every time I open the photos app, it gets really slow and then quits, leaving me with 0 photos and 1,000,000 anxiety.
I have software version 10.0.1. I am too nervous to update it to the newest version (though I have downloaded it, could this have caused a problem???). If I go to Settings>General>Storage>Manage Storage, it says I have 40.43GB of photos on my phone.
I thought I backed my phone up a few days ago (which is when I downloaded the new software version), but there wasn't enough space on my computer to back it up. So my last backup is from September (three months ago).
I tried backing up my phone again, but after asking me whether I wanted to sync contacts (so yes this means I have synced my phone which I read I shouldn't do after losing photos, oops), it said "could not back up iPhone because iPhone has been disconnected" but it wasn't disconnected, the wire wasn't broken or anything. I tried multiple times and a different wire, same result. I am too nervous to do anything else.
PLEASE help. I am in shambles over these past 3 years worth of photos. I am honestly questioning my life's worth and whether or not I should be alive right now. Lol honestly please help me before I off myself due to meaningless media-related stress
Tl;dr: lost all 11k+ photos on my iPhone, but they're still there (the storage is still being taken up); can't backup phone because it says it is "disconnected" even though it isn't; haven't updated to new software but it is downloaded to my phone; very scared and upset and wanting to die help thank you