Here's a hand I played at the end of my session. It had been an extremely frustrating day and I'm sure I went slightly tilty here. So is it really that obvious I missed the flop here? Was my pre-flop overbet a bit too much or does it back up my flop overbet?

PokerStars No-Limit Hold'em, $0.10 BB (5 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Button ($4.25)
SB ($10)
Hero (BB) ($10.20)
UTG ($4.50)
MP ($4.60)

Preflop: Hero is BB with A, K
2 folds, Button calls $0.10, SB bets $0.50, Hero raises to $2, Button calls $1.90, 1 fold

Flop: ($4.50) 3, Q, 4 (2 players)
[color=#CC3333]Hero bets $8.20 (All-In)