This is a stupid question but I am going to ask it just to have that mental clarity on the felt in these spots.

PokerStars - $0.02 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4: http://www.pokertracker.com

BTN: 100 BB
Hero (SB): 101 BB
BB: 157 BB
UTG: 106 BB
MP: 100 BB
CO: 220.5 BB

Hero posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Ah 3h
fold, MP raises to 2.5 BB, fold, fold, Hero raises to 9 BB, fold, MP raises to 21 BB, Hero calls 12 BB

Flop : (43 BB, 2 players) 9d Qs Tc
Hero checks, MP bets 11 BB, fold

MP wins 41.5 BB

As the only reason I'm 3betting this otherwise foldable hand is for fold equity, I should give up to a 4bet right?