ctgreddy

well i was drivin my car down the road today and i all of a sudden lost power steering for a few minutes. it then came back on for like 5 mins and now it wont work again. So what could be my problem? the belt is on, the pulley looks like it spins fine, and its topped off on fluid. my steering has been a little loose so im thinking maybe my rack went bad or something? i got a suspension/steering class in an hour for college and i'll take it in there and look at it but i just want some opinions on what it could be. thanks guys.