So I dont know how this exactly happened, but somebody attacked me with a ring of fleabite (I'll assume that he was wearing it) which normally damages fatigue some. Well the ring apparently left a curse on me that "damages" my fatigue constantly, and it just saps me untill I pass out on the ground, and then it keeps sapping me more so that I have a negative fatigue. The only way I can keep walking around is by wearing an amulet of stamina, which restores 20 fatigue per second. I've tried the chapels, dispels, cure diseases spells and potions. And i dont know how to get rid of it. The curse is defined as an enchantment that damages fatigue 13 points.
http://www.uesp.net/wiki/Morrowind:Ring_of_Fleabite#Ring_of_Fleabite

#1
Have you tried a potion of dispel?