Inadvertent whistle on over and back

[181174]

Toward the end of a jv game tonight that had already been decided, I lost my concetration and had a mental lapse, the team that was winning was working the ball up the court and A1 was straddling the halfcourt line, one foot and the ball in the frontcourt, one foot in the back court, she threw a pass across to a teammate that was crossing into the frontcourt she drops the ball and it goes back into the backcourt, I for some reason blow my whistle and start to call an over and back violation, which it wasn't, the coach from that team yells that isn't over and back, which as soon as a blew the whistle I knew it wasn't. I point to myself and say that I screwed up the call, my question is since I blew the play dead, do we go the alternating possession arrow? I called it a jump ball and went to the arrow, I wanted to see if that was right or is it a point of interuption and I should have give the ball back to the team that was in possession before I had the inadvertent whistle? I know I had screwed this up before in the past just couldn't remember what the correct way to procede is?