Live B&M 20/40 QJo

[BigFishSmallCardRoom]

Folded to cutoff. Cutoff (loose preflop raiser) raises to 40. Hero in SB calls with QhJc. BB calls.

Flop: Jh Jd 3h

Hero checks. BB checks. CO bets. Hero raises. BB folds. CO calls.

Turn: 2c

Hero bets. CO raises. Hero 3-bets. CO thinks for a moment, mutters something about pocket 3's then 4-bets. Hero thinks and then calls.

River: Kd

Hero checks. CO checks.

Hero takes the pot. CO mucks.

What do you guys think? 5-bet the turn, lead the river? Thought the CO maybe had AJ. Pretty sure he had AA after the showdown. Did I miss 2-bets? Maybe I'm too weak postflop.

Thanks for the input.