Unaware of my surroundings-this is really scary?!?

for the past couple of days ive been completely unaware of everything, its really hard to explain but its like my mind isn't attached to my body.. i feel like im barely in control of anything my body does or says, i cant say much because i have difficulty focusing when someone is talking to me, its as if i'm drunk except that i'm not. I'm pescetarian, could it be some kind of vitamin deficiency? i just wnat to know how to get back to normal because its freaking me out and i cant have a proper conversation with someone, i cant differentiate dreams and real life, im so confused !!! i just want to know if this will go away, and how soon. please help!