Why is my Kindle Fire acting so weird?

So... My Kindle have been acting odd for a while. It first happened about a month ago. I Was watching youtube and then it turned off. as it was turning off, I glanced at the charge button, and it said 0. I Let it charge a while, got back on, and it was all fine. It happened a few more times, rinse and repeat. Until yesterday. It happened again, so I decided to let it charge while I went to sleep. This morning, however, it wouldn't turn on. I Held down the button a few times, double pressed it quickly, but no matter what I did, it wouldn't activate. I'd love some answers, as I have had this for a while, and have a lot of personal images saved onto it