turn c/r semi-bluff: does this only work in limit?

[private joker]

5/10 live, 400 buy-in. I have like $150 left in my stack. Everyone at the table, including the porter clearing the cheese fries off the roll-table that were being shoveled down by the fat prick in seat 6, covers me.

Reads: MP is very loose and speculative, doesn't make moves, doesn't slowplay, doesn't read hands well. BB is decent and kind of tight, but will take stabs.

Three drooling idiots limp, so I complete in the SB with K[img]/images/graemlins/spade.gif[/img]4[img]/images/graemlins/spade.gif[/img] (BB is kind of passive, hasn't raised PF yet from the BB so I expected to see a cheap flop -- is this still a fold with my puny stack? Or can I invest 1/30 of it?) BB checks. 5 to the flop for a pot of 50.

The flop cometh Q[img]/images/graemlins/heart.gif[/img]9[img]/images/graemlins/spade.gif[/img]6[img]/images/graemlins/diamond.gif[/img]. Checked around.
The turn is T[img]/images/graemlins/spade.gif[/img]. I check, BB bets 25, MP calls. I shove for 125 more.

Am I the worst player ever?