Psychic help needed! I've lost my student I.D card and I'll be fined if I don't find it! Where is it?

Hi I've lost my student ID card and I get a fine if I can't find it :( Plus I can't actually eat without it, as it doubles as a cash card at the canteen, so this is quite urgent!!! Any intuitive guesses on it's location? Last seen last night in my room.