In that position you're far more protected from retaliation than a "regular person" -- it's easier to prove with an established history and courts really don't like have their judgments undermined. You've also shown your employer trying to screw with you is expensive.
Go back and do your job to the letter. They're either going to be very wary of pissing you off, or they're going to do something stupid and you'll get another payout.
Maybe they're a kid?