Hi,
If you do not have an A/V app installed on your phone, here is a link to just [https://play.google.com/store/apps/details?id=com.avast.android.mobilesecurity&hl=en|one] that is available.
Download, install and then run the A/V app to test for and remove any viruses etc.,and see what it tells you.
There are others that may suit you better, just search online.
Here is a [https://play.google.com/store/apps/details?id=org.malwarebytes.antimalware&hl=en|link] to an app that tests for malware. Do the same as above, download, install and then run the app.