Not very nice position to be in. They could easily have the straight, possibly have the flush. If they don't they may not be happy to call down with two pair on that board, so you stand to lose more than you gain. I think them holding an A here is more likely than two pair, so I might be happy to push with a boat.

I'm probably check/folding. Check/call the river if they check behind the turn. I think I might be too weak though.