I definitely agree with Grant. Especially as a good physio can really aid in reducing swelling, as well as assess if there's trouble brewing. Physios have great tools to reduce knee swelling, such as cryo pumps (ice with excellent compression) that they can apply with your leg is elevated. Here's a great at-home use cryo cuff, which is like having the compressive forces of a blood pressure cuff on your knee. You put it on, elevate, pump it up, and relax for a 15 minutes. Amazon.com: Corflex Cryo Pneumatic Knee Splint - ONE GEL - Universal Fits up to 24" circumference: Health & Personal Care

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Also, have you been getting regular massage/trigger point release/etc of your leg? With trauma muscles knot up and this can cause a big decrease in lymph movement, increasing issues with swelling.