Viki,
I would suggest you post your questions in the breastfeeing forum as well, I used to pump and at that age i really can't remember how long to pump, usually your emptying the breast to get to the hind milk, you will know when your almost emply by the flow and also often the colour, the milk even looks richer........careful not to pump too much too soon~! Being engoged is aweful!!!!! I am an expert at being engorged as I had enough milk for 3 babies I think.........good luck to you
Logan's Mom