Agree, totally normal, clears up overnight.
One of the great things about regular weekly gravel-clean-water-changes is that if you are doing them enough (not missing, or perhaps even doing more than weekly for a bit) then one of the rewards you will see after a while is that a gravel clean will not stir up nearly so much!
Nitrate(NO3) tests can be an aid in determining whether the size and frequency of such maintenance is being effective. If the nitrate(NO3) stays within about 5 to 15ppm above whatever the tap water nitrate(NO3) level is, then the cleaning should be going pretty well. There are many variables though, including fish and plant stockings.
~~waterdrop~~