Hi.
I think jsingles ment the fretwork on the fretboard, not Your fretting technique

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If You're anywhere handy and own a hex key suitable for the truss rod, I'd suggest loosening the truss rod for 1/4 of a turn first and see if that helps.
If the problem is most pronounced around the 3rd fret it sure sounds like high 4th fret to me too. You do have a fresh set of strings in it, do you? If the playing is mostly centered on the open, 3rd, 5th and 7th frets there's a tendency to wear the frets and strings on those spots very easily and if the action is low there's buzz.
A professional setup is never a bad thing though, but as every instrument and every player requires a bit different setup, it's a handy skill to have.
Regards
Sam