Oh angie...that is uncomfy isn't it!! I know, I have bad knees too and when they ache..the whole body is out of whack it seems.
If you can sit with some pillows under your knees to take the stress off them...with your legs up of course...like in a recliner that might help a little of the swelling.
Also, I've found that moist heat for 10-20 minutes followed by some ice for 10-20 minutes and do this every hour or two, might help with the pain and with the swelling.
Sure do hope you feel better soon!

sabby