Is this just wishful thinking?

So like clockwork for the past 7 months or so every time on CD21 before AF arrived my boobs hurt very badly.... Well today is CD21 and I have no sign of tender breasts, like AT ALL!... I know that tender breasts are a sign of AF and pregnancy... But my question is... Could the lack of tender breasts be a sign of pregnancy?? Since it is always a sign of AF for me??? Or am I just grasping for straws and hoping it was my month to much??