Well, you are certainly living up to your avatar but hopefully you can recover quickly. I have knee problems and ice it after a workout, that may relieve the pain and swelling.
Ice it and take it easy for a couple of days. If you continue to have pain, you may need an MRI. I have had several kinds of knee injuries, and had at least 2 MRIs.
Surprisingly enough they all resolved themselves, (sometimes with some physical therapy).
Sometimes a cortisone injection can do a lot if there is swelling within the knee joint.
Even without an injection, over time some tears can resolve themselves (at least to the point of no pain).
If you don't need knee surgery, you should end up with a good resolution, given enough time.