Forced carbonation changes the pH of the beer quickly and as people have mentioned, you've mixed in all of the yeast. Set it aside for 3 days and check it. The first pint or two will still be yeasty.
There are ways to speed up the process, but none of them are simple or easy.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk