Hm. Sorry to hear about the trouble. In your vault, there’s a hidden folder called .obsidian. Make a backup of that folder (though it doesn’t actually contain any content, just metadata like the current position of your panes and which plugins you have enabled). Then, in that folder, delete the cache file, and quit and relaunch Obsidian. If that doesn’t work, try deleting the whole .obsidian folder, then quit and relaunch. Report back!
(If you can’t see .obsidian, you’ll have to enable hidden files—on a Mac in Finder, the keycombo is cmd+shift+..)