I have got a problem. I finished the quest of the Curse Abbey. In order to finish it, I slept in a bed in the abbey. Now I keep loosing stamina.
In fat when I sleep, I have no stamina one minute later, wether I run or not. I can' regain stamina excep by potions (and stamina vanishes equally fast.
You haven't picked up the cursed weapon? I believe it was in the Abbey I found a weapon, I think it was a halberd, that kept draining my stamina all the time. Just drop the weapon and you'll be fine.