Brakes - all of a sudden no stop

Pedal travel does not appear to have changed.
Both really, the pedal always felt like it was pushing the fluid, but I could put the pedal down farther and it would slow down more as I went.

Now the pedal is the same all the way with no stopping power at all until the very end, and it still will barely stop, not driveable.
If I pump the pedal, it feels like it might 'pump up' like there is some resistance, but there is no change.