By chance, did you already try recovering your account by going through these steps: https://goo.gl/8HPfKr ?
Uh oh! Can you recheck and let us know if you're able to see the DM now? Thanks.
-
-
We've sent you a DM again!
End of conversation
New conversation -
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.