Were you using backupmanager? I hope so as you can just use a recent backup image you saved onto SD or another machine.
I suspect you were doing some intensive writing to your MyDocs and pretty much killed the usability of your swap which is on the same chip and i/o. There are swappolube hacks to work around the i/o issues writing to internal memory.

I suggest mounting your drives to another computer and cleaning out the file systems as you seem to have had much kludging of your file system. Recover what you can and then reflash to get a stable system. Don't forget backupmanager then make and save backups off of your N900.