I would think that too! I would always worry because I have miscarried before but every time I checked it was just discharge!
Its interesting that you never had it with your other kids. Im a first timer and ive been getting more and more discharge every week to the point where i also thought i was bleeding. But the book im reading says this, "vaginal discharge: to protect the birth canal from infection and maintain a healthy balance of bacteria in the vagina." It also makes knocking boots a little more interesting lol