Remove the hose and have someone gently push the pedal and see if you actually have pressure or if what is coming out is leftovers. If you do have pressure time to check the WC out. You should be able to press the WC pistons in and if they are stuck they should pop and release. I've seen this a few times. If they move by hand and still no fluid you have a blockage inside. Try putting a tooth pic into the bleeder and clean it out. same with inside the WC where the bleeder goes. if no luck just exchange it for a new one. I would recommend replacing the hose anyways to prevent any contamination in the new WC. Good Luck