My Kindle Paperwhite is messing up

I've had my Kindle Paperwhite for almost 2 years and just recently (within the past couple of weeks) it's started freezing up when I open my Kindle case and I have to restart it each time. I had the "about this book" menu open on one book and it was frozen, and I pressed the power button to put it to sleep (y'know, wishful thinking) and it actually froze one of the ads in the "about this book" drop down 😭

Is there an explanation for this? And is there anything I can do that ISN'T shelling out money for a new Kindle? 😭