Ax in BB

[chopchoi]

.50/$1 NL. I'm BB with A [img]/images/graemlins/club.gif[/img] 7 [img]/images/graemlins/heart.gif[/img]. 1 limper, SB folds, I check.

Flop: A [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/heart.gif[/img] 5 [img]/images/graemlins/diamond.gif[/img]. I bet $3, limper folds.

Turn: 2 [img]/images/graemlins/club.gif[/img]. Now I'm woried that limper has me out-kicked, but at the same time, I don't want to give him a free card if he has a draw or a Q, so I bet $6.

River: J [img]/images/graemlins/diamond.gif[/img]. I check, he bets $10. The pot is now $30. I calll, and he shows AJ.

Is there any way I could have lost less?