The only thing is time and yourself working with your issues now. I don't know how busy you are but you probably should have some time off, or at least one day to deal with it.

Some tips for these anxiety attacks. Breath and focus on your breathing, embrace the feeling instead of running from it and let it pass, laugh or dance to lighten the mood and know that you won't die.

Are these auditory hallucinations (I would think so) or is it like thinking someone is behind you or catching something out of the corner of your eye?

Read some reports on erowid.org to show yourself that you're not alone, then some exercise would be good to stop your mind from getting lost in it's own games.