Is is currently bubbling? If so, your fermentation is not stuck. It's probably just taking awhile due to the loss of a good portion of your yeast when you shook it up. Give it some more time.
Also, take a look at your fermentation temperature. You might want to move the fermenter to an area that is in the 68-70 deg range if not already there.
If it was stuck, you would have no activity at all and your FG would be higher than expected.
Make Beer, Not War.