Yes, children will self-wean. I intend to feed my dear daughter till she self-weans. However, in bianca's case, it sounds like a nursing strike coz usually weaning will be more gradual. Here's some info from kellymom.com:
Child-led weaning occurs when a child no longer has a need to nurse - nutritionally or emotionally. It's relatively unusual for a baby younger than 18-24 months to self-wean if they are not being encouraged in that direction (though things like mom's pregnancy may also affect the timing).
A child who is self-weaning will almost always cut down on nursing very gradually over a period of months, one session at a time (anything abrupt is most always a strike). Many children will continue with only a nighttime, morning or naptime nursing session (or a combination) for months before weaning. When a child self-weans, she will also have been drinking well from a cup and getting the vast majority of her nutrition from solid foods for a while.
I know it's hard to pump out milk after latching all along. i also can't get much out nowadays coz breasts are not used to the pump. I think you shld continue to pump even if there's no/little milk coming out. At least there's still stimulation...