Every session I seem to be losing one vital pot. I feel I am getting unlucky and coolered. However I am open to the idea I may be playing these spots badly. 

Hand 1

PokerStars - $0.05 Ante $0.01 NL (6 max) - Holdem - 4 players

BB: 267.6 BB (VPIP: 28.36, PFR: 20.90, 3Bet Preflop: 12.50, Hands: 68)

CO: 439 BB (VPIP: 33.33, PFR: 14.55, 3Bet Preflop: 0.00, Hands: 390)

BTN: 189.4 BB (VPIP: 33.33, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 12)

Hero (SB): 402.2 BB

Hero posts SB 0.4 BB, BB posts BB 1 BB, 4 players post ante of 0.2 BB

Pre Flop: (pot: 2.2 BB) Hero has 5s 5d

CO raises to 5.4 BB, fold, Hero calls 5 BB, fold

Flop : (12.6 BB, 2 players) 5c Qc Ks

Hero checks, CO bets 7.8 BB, Hero calls 7.8 BB

Turn : (28.2 BB, 2 players) 3d

Hero checks, CO bets 24.8 BB, Hero raises to 63 BB, CO raises to 189.8 BB, Hero raises to 388.8 BB and is all-in, CO calls 199 BB

River : (805.8 BB, 2 players) As

Hero shows 5s 5d (Three of a Kind, Fives) (Pre 19%, Flop 4%, Turn 2%)

CO shows Qd Qh (Three of a Kind, Queens) (Pre 81%, Flop 96%, Turn 98%)

CO wins 795.8 BB