Oh no, I hit a full house! This sucks!

[Azhrarn]

Party Poker 5/10 Hold'em (9 handed) converter

Preflop: Hero is MP3 with 7[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, MP1 calls, <font color="#666666">1 fold</font>, Hero calls, <font color="#CC3333">CO raises</font>, <font color="#666666">1 fold</font>, SB calls, BB calls, <font color="#CC3333">UTG+1 3-bets</font>, MP1 folds, Hero calls, <font color="#CC3333">CO caps</font>, SB calls, BB calls, UTG+1 calls, Hero calls.

Flop: (21 SB) 4[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, UTG+1 checks, Hero checks, CO checks.

My first thought when it got checked around is someone's slowplaying pocket aces.

Turn: (10.50 BB) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, UTG+1 checks, <font color="#CC3333">Hero bets</font>, CO calls, SB folds, BB calls, UTG+1 calls.

I actually let out a small groan of pain when I saw the turn card. And then I immediately started thinking of other reasons the flop may have gotten checked around other than a flopped full house.

River: (14.50 BB) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, UTG+1 checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">CO raises</font>, BB folds, UTG+1 folds, Hero calls.

Final Pot: 18.50 BB

My heart sank when I got raised, but I called anyway. Is there any other way to play this hand?