$1.10, A5s, trips on straighty board

PokerStars, $0.98 + $0.12 - Hold'em No Limit - 75/150 (15 ante) - 9 players

UTG: 10,764 (72 bb)
UTG+1: 14,255 (95 bb) VPIP 63, PFR 6.7, 30 hands
MP: 5,003 (33 bb)
MP+1: 7,044 (47 bb)
LP: 4,298 (29 bb)
CO (Hero): 4,656 (31 bb)
BU: 3,418 (23 bb)
SB: 7,782 (52 bb)
BB: 3,113 (21 bb)

Pre-Flop: (360) Hero is CO with A♥ 5♥
1 fold, UTG+1 calls 150, 3 players fold, Hero raises to 450, 2 players fold, BB calls 300, UTG+1 calls 300

Flop: (1,560) 5♣ 6♥ 5♦ (3 players)
BB checks, UTG+1 checks, Hero bets 546, BB folds, UTG+1 calls 546

Turn: (2,652) 4♥ (2 players)
UTG+1 checks, Hero bets 1,200, UTG+1 calls 1,200

River: (5,052) 7♣ (2 players)
UTG+1 checks, Hero ?????

Hi,

I planned to shove almost any river. Got cold feet on this one. After seeing villain's hand, couldn't help but feel I missed value. Would you shove despite 4-to-a-straight on the board?

Any comments on preceding streets?

Thanks!