HELP ME!!! LOST MY KEYS!!!?

Ok so I'm in college and I went on an outdoor orientation trip for five days and brought my keys with me, when I got back from my trip I got to my door, and took my keys out of my backpack and unlocked my dorm room door. I then put my backpack down at the head of my bed and threw my keys towards the foot of my bed. Im almost positive I heard them hit wood, and I didn't bother to see where exactly they went. My keys have 10 keys on it (including my dorm room key), a small pocket knife, a small flashlight, and a bottle opener, so it isn't exactly like they could just completely disappear. But alas, here I am 3 days later, completely keyless. Last night I took all the sheets off my bed, and my mattress and looked all underneath my bed and in my sheets. They are nowhere to be found!!! At this point Im literally starting to think they have disintegrated into thin air. My room is set up like this [DESK][B E D][dresser] closet||| and my roommates side of the room is the same. My bed, dresser and desk are all made out of wood, and there is also a 3 tier wooden bookshelf above my desk. I have some boxes and duffel bags underneath my bed, a 9ft kayak along side my bed, and my closet is an open space. I have been searching for them for the last 2 days, and my roommate is starting to feel uncomfortable about leaving our door unlocked, but i have no option, also my bike is locked up outside with a key that's on my key ring. So in closure, I am in DIRE need of any ideas, I am starting to lose my mind! Please help!! I will award the best answer to the answer that leads me to my keys!!! Thanks!!