Mine did the same thing, and at about the same time. I noticed it when I got up from watching the evening news and felt some discomfort behind my knee. Reached down, and there was swelling sufficient to cup my hand around behind my knee, thigh swollen giving me a muffin top at the top of my TED, and fat little toes. It worried me some as diffuse swelling can be a sign of clot development, but there was no pain involved, so I relaxed, got into bed and elevated that leg with a pillow stack, and iced. It did decrease, giving me more peace of mind. The next day I spent far more time elevating and icing, and it did the trick. I was, however, lectured by the nurse about self diagnosis when I told her about it. I know, I know. It happened, of course, on a Friday night, and coincidently, a day I'd spent far more time up and about.