call off middle pair?

[Bentley]

Villain is 30/22, quite aggressive, agg factor on river is 2.0
It would seem polarized the way played so I'm in a difficult spot.
Possibly a turn shove?
PokerStars, $14.70 + $1.80 - Hold'em No Limit - 700/1,400 (210 ante) - 8 players

UTG: 86,223 (62 bb)
UTG+1: 13,021 (9 bb)
MP: 40,783 (29 bb)
MP+1: 103,947 (74 bb)
CO (Hero): 21,328 (15 bb)
BU: 137,079 (98 bb)
SB: 17,340 (12 bb)
BB: 52,982 (38 bb)

Pre-Flop: (3,780) Hero is CO with 4♦ K♦
4 players fold, Hero raises to 2,800, 2 players fold, BB calls 1,400

Flop: (7,980) 3♠ 3♥ J♠ (2 players)
BB checks, Hero checks

Turn: (7,980) 4♣ (2 players)
BB bets 4,789, Hero calls 4,789

River: (17,558) 9♠ (2 players)
BB bets 21,070

[LondonImp]

We need to be good here 31% of the time to break even, so really we want to be good about 33% of the time to give us an edge.

On that particular flop structure against a BB I think we should be doing a large amount of checking.

We should therefore still have a lot of pocket pairs stronger than a 4, and I'd be looking to start building my calling range (aside from JJ/44/99 which are a given) using these that have a spade to block the nuts.

[MoeLestin.jr]

Possibly turn shove, because you might be good on that turn? Will you be comfortable calling off non-flush river? Why check back flop again?

@London: do you think poker is harming you?

[Bentley]

turn shove for protection

[LondonImp]

Huh..? Not sure what you mean.