He looks like he's protecting a hand although he could have the A of diamond or a set? What do u say?

PokerStars No-Limit Hold'em, $0.25 BB (8 handed) from (Format: FlopTurnRiver)

UTG ($24.75)
Hero ($24.50)
MP1 ($13.15)
MP2 ($6)
CO ($27.85)
Button ($21.25)
SB ($33.80)
BB ($12.35)

Preflop: Hero is UTG+1 with Q, Q.
1 fold, Hero raises to $1, 5 folds, BB calls $0.75.

Flop: ($2.10) 4, J, K (2 players)
BB bets $1, Hero raises to $3, BB raises to $11.35, Hero calls $8.35.

Turn: ($24.80) A (2 players)

River: ($24.80) 2 (2 players)

Final Pot: $24.80

I say that your reraise is good, your call of his all in is bad.

I agree. If he has a set, you're behind and don't have odds. If he has the , you're ahead very slightly. If he has a King, you're behind and don't have odds to chase. If he has a flush, you're behind and don't have odds to chase.