Upon entering the dungeon to retrieve a Great Welkynd Stone, my magicka and health stopped regenerating over time. Sadly I don't have a save prior to entering the Aeleid ruin and I've already completed it. is there a quick fix?

Check and see what magic effects are in your active list.

./facepalm

Thanks HeyYou! this is what I get for taking a very long break from Oblivion and coming back to the exact same save.