i played 56 off suite from big blind. 3 players limped, THE flop was 347 rainbow, obvious ideal.. I CHECKED, MIDDLE POSITION BET 6, the OTHER TWO PLAYERS CALLED. I RAISED TO 18 EVERYONE FOLDED. I HAD RAISED BECAUSE I WAS CONCERNED ABOUT 3 PLAYERS BEING IN THE POT, HOWEVER I THINK I SHOULD HAVE JUST CALLED AND allowed them to see THE TURN CARD AND PROCEEDED FORM THERE. WHAT IS THE CORRECT PLAY?