Echoes is so correct. I would password protect that blog in a blink and create a new one with a different email addy and everything to prevent anyone from 'searching' and finding the new one.

I would have to say I would be scared too. I suppose you will have to watch your supervisors behavior to be able to tell (if at all) what they think about you now. And I would suggest you really be on guard for a while until you figure out their intentions.