backcourt violations

[C]

This is about a back court violation. If I am full court pressing and there is a loose ball rolling to my back court and I am racing to get the ball and pick it up before the opponent, and during the play I cross over half court into my back court, is that suppose to be a violation? Isn't there a momentum rule that allows the defense to gain possesion and slow down without having to jump before the line and toss it to our front court? Otherwise I would have to let the ball roll past half court before I pick it up which would give the opponent time to retrieve the ball before me. The rule I feel should not be to any dissadvantage to the defense when full court pressing. What if I jump from my front court while full court pressing and catch the ball and land in my back court? Please help me understand this ruling, my team has been hurt by it too many times from refs that call everything a back court violation when pressing full court.