Gambling too much?

[Vike]

I haven't played much no-limit Holdem, mostly a 7-stud player.

I guess I am gambling too much here? [img]/images/graemlins/confused.gif[/img]

$2-$5, $200 max buy-in at The Bellagio.

Before this hand I had increased my stack to $400, my main opponent has about $225

Pre-flop: couple limpers, I limp with 6 [img]/images/graemlins/club.gif[/img]5 [img]/images/graemlins/club.gif[/img], a limper behind me, plus the blinds, 6 players, pot is $30

Flop: 9 [img]/images/graemlins/club.gif[/img]-8 [img]/images/graemlins/club.gif[/img]-6 [img]/images/graemlins/spade.gif[/img], 4 checks, I check, last position bets $30, folded to me I raise $75, after about 10 seconds my opponent goes all-in for about another $115, I call

About my opponent, he would limp there with T [img]/images/graemlins/club.gif[/img]7 [img]/images/graemlins/club.gif[/img], not with T7off I believe. Would limp with a medium pocket pair there, raise a big pocket pair. I don't think he would gamble his stack on a mere flush draw so I was pretty certain he had a made hand of some sort.