Monica -- it will take several days {I wouldn't be surprised if it's weeks} for NewCo stock to show up on your brokerage's ledger -- and it is unknown how it will be reflected by each brokerage.
Among the reasons include having to get final determination on how to convert the shares (the minutia of 75/25% vs. shares released in each class, etc, etc)
The bottom line is, "you {all} were warned" by the EC about this "dark" period. And the unknown length of it.
Freaking out now, and/or freaking out then, I don't really support.
It's been a well-known, well-disclosed fact for some time, that trading may not be possible -- and likely, until the bare minimum of filings occur -- be not tradable. There's a strong piece of me that wants it that way. I made my bets, and would rather not have the MM'ers screw with this more until we get a more stable "Reorganized WMI" ... and THEN start trading again.
...Catz
.... Please, just call me Catz ;) - - - - - {and the requisite, all IMHO, do your own due diligence, and make your own investments}