I tore mine in 2006 skateboarding. The only thing on my mind was "emergency room," and I couldn't put any weight on the leg at all. About 1/3 of people have this response, 1/3 have severe pain/swelling but are able to put weight on it, and 1/3 feel "wobbly," at least until they eat shit and destroy all the rest of their knee ligaments too.
Get checked out ASAP if it's more than "sore." I hope you have insurance. $26,000 for surgery, custom athletic brace, and rehab, and that was in 2006.