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I think it’s a tough spot. There’s still the original raiser behind you. HU it’s an easier call if you are willing to coin flip (you could be ahead but it’s just as likely a coin flip against those Js or Qs). With another player still to act I might lean towards folding. If that player calls you’ve either got another pocket pair to contend with or one of your Aces is gone.
If you’re playing well and have a handle on the field/tourney you can still use those 21 BB to your advantage in better spots.