iPone 5s won't turn on

Okay, so, this morning my I woke up and immediately went on my iPhone 5s (it is a 16 gb and barely had any storage space left), but it kept freezing and when i was on iMessage, it kept vibrating as if it were getting a bunch of notifications (it wasn't, it does that a lot when theres not enough storage) but then it started to work. A little later, I put it on airplane mode for a while because I was busy where I didn't want to get notifications on my phone. Then, I came back to use it and tried to take it off of airplane mode but it wouldn't come off but it let me use wifi while on airplane mode. So, I turned it off planning to restart it and it only goes to the white screen with the black apple logo and will not turn on. It just goes back off. I have tried to plug it into its charger and it still won't turn on! I have done this about 6 or 7 times including the one time with my charger. I have no idea what's happening, but I'd really appreciate all the help I could get.😕