Your drive appears to be failing. The test normally completes in about 3 minutes, and your took over 20 minutes. Also your I/O test timed out (failed).
Re: backups--
If you submit your Mac to Apple, and they replace the drive, it is likely to return to you with only MacOS, and none of your files. That is why I was asking about what copies you have, and whether that is enough. MacOS can be re-installed form Apple in a bit over an hour, as a perfect replica of itself (it does not self-modify). Your files are different matter.
It certainly appears your Mac needs service. You can run the diagnostic by holding D-for-diagnostic at startup, and waiting for it to download and run. or you can just make an appointment and bring it in.