Is there any way to access my posts dating back to 2004?

When I brought up the "all my posts" it only let me access the last 5000 which only took me back to 2016. I am doing some research & there has been a lot in my past I have been needing to go back into.

For awhile I was able to access them all but now I can't. A lot of what I wrote about what I was going through was only written here