Party 100nl

[sledgerr]

No read on opponents, other than the initial raiser 3 bet me in the very last hand. Playing so deep, and with villains stack, what's my best move. Smooth calling has my hand almost face up, and if i 4bet, whats the correct amount? Thanks
***** Hand History for Game 6186196326 *****
$100 USD NL Texas Hold'em - Friday, July 27, 05:24:31 ET 2007
Table Jackpot #1304522 (No DP) (Real Money)
Seat 3 is the button
Total number of players : 5
Seat 5: Hero ( $403.88 USD )
Seat 4: MbI_6pATBa ( $245.20 USD )
Seat 6: nullvier ( $193.17 USD )
Seat 1: fatfreddycat ( $115.25 USD )
Seat 3: pygoc3ntrus ( $196.95 USD )
MbI_6pATBa posts small blind [$0.50 USD].
Hero posts big blind [$1 USD].
** Dealing down cards **
Dealt to Hero [ Ah Ad ]
nullvier folds
fatfreddycat raises [$4 USD]
pygoc3ntrus folds
MbI_6pATBa raises [$13.50 USD]
Hero....