The biggest problem I have with TPTK is how to play a big raised pot against multiple callers.

At the Bodog $100 table on my first hand, I was dealt AQ in late position. There were 3 limpers, so I raised to $7 and there were 4 callers. This meant on the flop there was about $29. The flop was good, Q79 rainbow, giving me TPTK. It was checked around to me, so I bet $22. An early position player called. Everyone else folded.

The turn completes the rainbow with a 2, not completing any draws. My problem comes here. How do I handle this situation, on the turn, if it is checked to me? I could likely be up against a dominated pair, a straight draw or a set. The flop call and the turn check didn't really give me any info (no Pokertracker on Bodog, either), but I was covered.

I think the right move is to bet, but there's $73 in the pot (-3 in rake). I have $71 left in my stack. A normal bet should be at least half the pot. If I bet $40 I have $31 left. If I am reraised, I can't just fold to less than min-raise, so I am effectively all in if I bet. If I bet (either $40 or all in), I am risking donking off my buy-in with TPTK.

Thoughts?