SLR photography

[FIRE!!!]

Here's the deal, I recently picked up a used SLR camera for my photo class, anyways our first assignment was to take a sequence of 5 shots involving your friends outside in broad daylight, blah blah blah. Stupid me, I loaded the film, took 5 shots, and UNLOADED the film, not knowing you have to use the whole reel first. Now the film advance will not budge, and whenever I try to take a picture, I push the button and all that happens is the camera makes an annoying beeping noise.

Anyone here schooled in SLR photography, have any idea what's wrong with my shit? Also if there is any way to fix it?