Have my cheeks been overfilled? (Photo)

Hey there, thanks for the question!
To me they don't look over filled, and I certainly wouldn't look at you and say you've had too much cheek filler. They're smooth and there are no obvious lumps. It's difficult to be objective without a picture of your cheeks before filler though, so really you're the only person that can answer that question.
It's never easy to get absolute symmetry in any patient and I wouldn't aim for this rigidly. Your cheeks look fine!