Check the power steering bushing. Super common. And it's a cheap and easy fix. About $25-$50 for the tool and like $35 for the part. Rock your steering wheel back and forth, if it makes the same clunk/rattle sound you hear as it does when you go over a driver side speed bump, it's the power steering bushing.
Here's a video...
(this one is REALLY bad)
(garage tech view)