Desperate changed AD to Native on a Mi

Made huge mistake… changed test server which was connected to network to native… had one nt pdc on network… and two members servers connected to pdc… all workstations are w2000 professional… … I than compounded problem by changing the pdc to workgroup than back to network domain… and did the same on the member server that I can’t log on to now. I was disconnected from win2000 AD. now i can’t connect to pdc and none of the member servers can connect to pdc.. one server is stating ” the system can’t log you on (c00019b)… And the workstations are showing a netlogon error…. Any quick assistance would by appreciated?.