I’d still suggest for you to try either rpmfusion’s or negativo’s packaged driver, even if not right now. See also about packaged/native driver experience people reported in this thread:
My points there are the same I wrote to you, look for other people’s experience with packaged drivers. My own experience concurs: it’s cleaner and easier way to install/upgrade/remove nvidia’s driver.
Also you can test both uninstalling driver you have now, then rebooting and looking if you can boot successfully to 5.1 and installing latest driver from negativo17 afterwards. ) Also you can wait for a couple of days to see if negativo’s packages will update.