Hi @Danjue
Welcome to the AntennaPod forum, and I鈥檓 sorry that this has to be your first post 
This issue is reported by others as well, both here on the forum and on GitHub, where development happens: Data wiped due to database corruption 路 Issue #2463 路 AntennaPod/AntennaPod 路 GitHub
An overview with more details, including links to posts where people explain how they recovered their data, can be found here: I lost my data and I no have idea about I lost this - #4 by keunes