Have you forced it to restart? By holding the home key and power key at the same time until the Apple appears on the screen? Recovery mode is another option to try. Look at this Apple article and try the things suggested in it. https://support.apple.com/en-us/HT201412
Hello Penny61, your support is here. We want to make sure that your device works properly. Along with the restart option that I see suggested, I would suggest recovery mode if that step fails. Here is a link: https://support.apple.com/en-us/HT201263. Please share the results with us. BobbyN_VZW
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