QQ/diamond flop/second nut draw; fold or call?

[AJackson]

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP3 ($135.80)
CO ($73.30)
Button ($97.50)
SB ($19)
BB ($116.95)
UTG ($201.10)
UTG+1 ($75.80)
Hero ($88.75)
MP2 ($92.50)

Preflop: Hero is MP1 with Q, Q.
[color=#666666]1 fold</font>, UTG+1 calls $1, [color=#CC3333]Hero raises to $5</font>, [color=#666666]1 fold</font>, MP3 calls $5, [color=#666666]1 fold</font>, Button calls $5, [color=#666666]2 folds</font>, UTG+1 calls $4.

Flop: ($21.50) K, 9, T [color=#0000FF](4 players)</font>
UTG+1 checks, [color=#CC3333]Hero bets $20</font>, MP3 calls $20, [color=#CC3333]Button raises to $92.5</font>, UTG+1 folds

No real reads on my opponents. They've not done anything to make me think thier overly aggressive or stupid.

I hate folding this hand, but I have to assume I'm behind. AK with a diamond, made flush, made staight, set. I'd have to be hoping for an ace rag diamond draw. Heads up it's not a good call with another player left to act it's even worse. Easy fold, right?

This hand has been bothering me, wanted to see what others thought.