Lost all my Notes after upgrade to High Sierra - mac book pro mid 2012

All my notes have been wiped out after i've upgraded to High Sierra.

ps. I don't store anything on external web host...

so I'm hoping to find it back in my computer... but how?

PLEASE someone help me.. i have more than 2 years of notes. Very important for me. Thank you.

i've searched and found this suggested solution, but it doesn't work for me... (so you don't give me this solution as i have already tried it.. 😉 )

1) web search with : ~Library/Containers/com.apple.Notes/Data/Library/Notes/

2) it lead me to the Notes files on computer :

- NotesV7.storedata

- NotesV7.storedata-shm

- NotesV7.storedata-wal

3) add .html to the first file (that would contain all the data)

4) make a web search with it (NotesV7.storedata.html)

> I'm not getting any document with this search, only a Google search result page with links to various websites.