Sadly, quite nothing to do I fear, see:
22 pages term paper replaced with pound signs.Check the temporary folder of the system (see in OO Tools>Options>OO>Paths). If there are folders like sgmlf.tmp with a file having the same name inside, make a copy of that file, rename it in .odt and cross your fingers. If you have not rebooted, you might have those files still there.
If it had been a .odt, you may have been able to recover something but .doc is a binary format, hence the alien characters. Only MS guys might be able to decipher it. That's why open standards like ODF (.odt) were created...
If you want to help fix this problem, you can also do this survey created for this very problem:
Document Recovery Survey.
LibreOffice 7.0.3 on Xubuntu 20.10 and LibreOffice 6.4.6 (portable) on Windows 10.