Help Me Clean This one Up !

[Chess Ref]

We kicked it and then I'm thinking we kicked the clean up part also.

Girls Varsity. We're going to the line for a routine shooting foul. Player shoots the first one, then coach requests a time out. Players come out of the time out and as I'm getting ready to administer I have a brain fart and can't remember if she is shooting 1 or 2 shoots now. So I ask partner and he tells me 2....So free throw is shot hits the rim and goes straight up. At this point players start trying to rebound and I tweet,thinking we have one more to shoot. So my whistle was pretty quick and no one had possesion of the rebound and the play was now killed and it turns out she had her 2 free throws already.

So we went to the AP arrow since no one had possesion of the rebound..

Was that correct ?

Can someone take the time to explain to me what would we have done if I hadn't quick whistled and someone had rebounded the ball ?