You should go see a orthopaedic doctor and get a full exam and find out what can be done, if it's as bad as you say, at best he'll start you out on
Lortab (hydrocodone), which should help your pain immensely, but know what the end results are starting with narcotic pain meds, if they're ever used irresponsibly they will cause much more pain then what you're experiencing now, and you will go through withdrawals once you go off of them, and they're worse then you can imagine. You need to be open to the idea of surgery, otherwise he will not treat you for pain mgmt, he may also ask you to try physical therapy, surgery is the last option and the most aggressive approach, but they're surgeons and that's mostly what they like to do, some only. I know pain sucks, if you can, you're really better off not using pain meds, try and think of it like, you have no other choice; it really is better sometimes to take the pain. Knee braces, and using hot/cold pads do help quite a bit.
If you're set on going with pain killers, do not like them too much, it's their nature, it's what they do, if abused they will turn you into a fiend and destroy your life as you know it, they're the best things in the world and at the same time the worst. You're way better off having the surgery before taking meds, take them for a week or two while you recoup, then stop.
I hope this helps, and good luck
Cats