Is this normal?

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My son turns 2 on sept 8. He still cries SO MUCH. It's come to the point that our neighbors have started complaining. We're not in apartments or anything, they are neighbors across the street. He's my fourth, my second was a crier too but it seemed to mostly resolve by this age. We've been with his primary doctor for 16 years and feel like he might be overlooking potential issues because he doesn't take an in depth look anymore because he "knows" us.