It has been 5 months now

Last week I ran a 5k, the first real physical thing I've done since the injury. I survived, and didn't walk in any part of the run. Though my time was rather slow (34min/30sec) I did my goal of no walking. I iced immediately after the run using ice from the water bottle tubs. The next day I noticed my knee a bit swollen so I iced again, but no significant pain. I still have pain when I stand up quick after sitting for long spells (such as driving distances, or at my desk at work). I've been biking and plan to do more running but no 5k's yet. I'd guess doing the 5k last weekend was a bit premature, but my knee survived ok.