Flop overpair bet vs unknown call

[papivilla]

0/0 Texas Hold'em Game Table (NL) - Fri Sep 07 14:23:07 EDT 2007
Table Table 128383 (Real Money) -- Seat 6 is the button
Total number of players : 10
Seat 1: UTG2 ( $12.48)
Seat 2: MP ( $1.70)
Seat 3: MP2 ( $13.07)
Seat 4: MP3( $11.95)
Seat 5: CO ( $16.23)
Seat 6: Hero ( $9.31)
Seat 7: SB ( $15.83)
Seat 8: BB ( $11.09)
Seat 9: UTG ( $9.90)
Seat 10: UTG1 ( $10.77)
SB posts small blind (0.05)
BB posts big blind (0.10)
** Dealing down cards **
Dealt to Hero [ 9 [img]/images/graemlins/spade.gif[/img], 9 [img]/images/graemlins/heart.gif[/img] ]
UTG folds.
UTG1 folds.
UTG2 calls (0.10)
MP2 folds.
MP3 raises (0.50) to 0.50
CO folds.
Hero raises (1.50) to 1.50
SB folds.
BB folds.
UTG2 calls (1.40)
MP3 folds.
** Dealing Flop ** : [ 8 [img]/images/graemlins/club.gif[/img], 5 [img]/images/graemlins/club.gif[/img], 5 [img]/images/graemlins/heart.gif[/img] ]
UTG2 checks.
Hero bets (3.10)
UTG2 calls (3.10)
** Dealing Turn ** : [ Q [img]/images/graemlins/club.gif[/img] ]
UTG2 checks.
Hero bets (4.71)
Hero is all-In.
UTG2 calls (4.71)
** Dealing River ** : [ 3 [img]/images/graemlins/club.gif[/img] ]

Should I think that I'm facing an overpair or flush draw, after he called my flop bet? Should I just C/F turn/river after the flop call?
...villian had the same pp I got..