50NL - 99, I misapply Dero's combinatorics?

[Willem]

No real reads as villain only sat down an orbit ago orso. He has been very active though, so I'm not giving his 3-bet too much credit (hence my call pre).

On the flop, I think two overs are a bigger part of his range than an overpair, so that's why I decided to raise for protection.

Is this flawed thinking by me? How would you play here? I think folding pre is very reasonable. Is calling reasonable too? If we do this, then what's our plan for the rest of the hand?

All comments welcome.

PokerStars No-Limit Hold'em, $0.50 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($47.20)
Button ($25.75)
SB ($30.35)
BB ($28.95)
UTG ($38.55)

Preflop: Hero is MP with 9[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $2</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">SB raises to $5.5</font>, <font color="#666666">1 fold</font>, Hero calls $3.50.

Flop: ($11.50) 2[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $7</font>, <font color="#CC3333">Hero raises to $25.5</font>, SB calls $17.85 (All-In).

Final Pot: $61.21