A few thoughts from an ACL injury veteran...
If you are concerned about the swelling, your orthopod will know whether it's warranted. If he/she is concerned, he/she can do an "aspiration" -- basically, a large gauge hypodermic is inserted into the knee joint capsule and the swelling is drained via the hypo. Aspirations were quite common before MRIs and CT scans became the usual diagnostic tools. They often were used before doing arthrograms -- contrast dye injections used in conjunction with x-rays, to see the ligamentous/cartilagenous damage.
If you have ANY reason to doubt your current orthopod's "match" with your goals and your injury (finding a good orthopod is like finding a lifelong partner, you must be in touch with each other's goals and activities), then go find another. You don't have to stick with the current MD. You can always get a 2d opinion -- but ensure that the 2d opinion is from an orthopod that is well-KNOWN (not rumored, not touting self as) to be a serious knee surgeon for serious athletes.
Last, you might want to check this other thread
for ACL/knee related info.[ February 17, 2004, 11:58 AM: Message edited by: gonzostrike ]