Have a set. Spew?

[manbearpig]

I thought of 3 betting preflop but if I miss with a couple over cards I am in a bad spot OOP. A lot of check folds result.

The only way I was not going to get stacked was to bet/fold the turn. But how can you bet fold there? Lead for 7 or so, pot is $17ish. He would have raised AI making the effective pot $36 that I would need to call $12 into. Must call right? Ahead some plus draw to boat.