So Iona recently attacked me in Honeyside in Riften. I thought this was odd but i was on a mission so i just continued on my way. later I entered my house in Windhelm and Jordis and Calder both tried to kill me. Any idea why this is happening?

This hasn't happened to me (yet). Interesting, nonetheless.

Are you a Vampire by any chance?

You must be a blood svcker.

Seriously, guys? being a vamp makes all your house carls go agro?!

Yes. Night Demon.