NL50
I'm on the button and am dealt

. The cut off raises the pot ($1.75)
Should I call, fold or 3 bet here?
I felt that 9's whilst not the strongest, were worthy of a flop but only called. Pot $4.25
Flop

Original raiser leads out for $3.50
What would you do here? I min raised to $7 (bad play I guess) to imply the strength of the over pair but looking back it's far to weak to get rid of anyone.
Turn

Pot currently $19.25 and he leads out for $16.50
What do you do now? Open ended straight flush draw and second pair but obv he may have a flush already. Is it an obvious fold?