So I had speakers plugged into the back of my computer and everything worked fine.
I bought headphones, but didn't have a headphone jack. So I tried to plug my speakers into the other 4 holes to see if any of them worked, and they didn't.
Plugged back into the original and now they don't work in it either.
Am I fried? Do you think it's the sound card on my motherboard or my speakers?
After the fact, I figured out I had a headphone jack on the front of the computer, but we'll just forget about that part.