That's what I thought and with my son it didn't come in until he was born so I just kinda wondered
It's the babies first milk.....it can sometimes be yellowish or clear/watery etc
its the colostrum, which is babies first "milk"until your actual milk comes in, it has all the antibodies etc that are essential for baby in the first couple of days, its normal for you to leak some, some notice it earlier than others :)