When driving, car revs to 5000 rpms but won't down shift. on 2009 Chevrolet Malibu

I turned it off and waited a couple of hours and went to get an oil change. The car has been fine since. Should I have it checked out more? Could there be an impending transmission problem that was temporarily fixed by resetting the low oil status?

1 answer
have trans codes scanned to see if there are any codes