wow. thanks. what do I do if it's hydro-locked?
If you let it sit overnight, by now it will have bled the pressure off thru the checkvalve. (If that's what the problem was) So, go see if you can push the pedal down now. If you can, it's probably not mechanical, i.e. pedal crosspin.
Don't sit there with a shit eating grin on your face, pumping away, and saying 'oh goody,, no more problem.' because you'll just hydrolock it again.
After you were successfully able to push the pedal down once, go get you green bible and adjust the pedal freeplay, and then you can go play.