My phone is showing a loading sign and not turning on
My phone has recently been very low on storage - I’ve deleted loads of photos and videos, and I only have 3 extra apps. When I look at how much storage I have, it says ‘Other’ takes up 11GB out of my 32GB. Also, most of my apps crashed (suddenly took me back to my home page) after using them for more than a minute. I turned it off and on again and usually it would work again. However, a few hours ago, as I was turning it off it showed a blank screen with a small loading sign in the centre. It has now been doing this for several hours. I have tried holding the power button, pressing the home button and the power button together three times, and it’s been on charge the whole time. What should I do?
iPhone 7