Listen, when my dad had a brain tumor, they told him right away. Generally speaking, they want to move as fast as they can when comes to figuring out what those are.
Bottom line, WE DON'T KNOW why the doctor hasn't called yet—if it's because you're in the clear or if they haven't gotten the results, but I promise you, continually asking for reassurance about this is not helping your HA. Trying to simply get rid of your worry isn't an effective way to reduce your anxiety. Be worried—nothing is really going to stop that, because if it did you'd have stopped asking about this long ago.