SOLVED: steam unchecked my previously installed ODLC. I had all my CDLC linked to that ODLC. Rechecked them on steam: presto. Everything's back. Thanks to anyone who may have been looking into this though :)
Basically what the title says. I bought some official DLC through steam's summer sale, it installed in the same folder where all my CDLC is but now none of my CDLC is showing up in the game. It's all still in the folder and I tried to repack it all, but it's not working.