Leakage

Brittany • Hello! I`m 26yrs old married for 5 yrs we have a 5yr old daughter and 3yr old son .. We are trying for our 3rd child
5days before AF is to show and no BFP yet but in having nipple leakage that is yellowish /white when I squeeze my nipples.. Could this be because I'm close to my AF or could it be a sign of pregnancy