he was c/r 28% of flop. did I play this correctly? I figured on the turn i had to call once more with the hearts and the river made it less likely he had a Q. ????

Sometimes you cant just depend on villain's stats, you have to think about what he is checkraising you with.
Most of the time a checkraise like this is flopped set or a draw.
If villain has shown some reckless or spewy checkraises that went to showdown then take note.

But as played I think calling his c/r on flop is fine as your hand could improve on later streets, calling on turn is fine also, on the river depending on history played by villain and if I feel like being a hero lol I would also call.

this is a very tough fold, river is super trivial and player dependent etc. he can have many combo draws here, and also be trying to push u off hands as well. if hes more value oriented on turn and river AF, then I would consider a river fold, but not too easy for me, since i suck at hu cash.