Its been less than 20 days since my ACL reconstruction on the right knee. I am now on a single elbow crutch. In the mornings, it is very painful to straighten out the leg. Should I wear the knee splint while sleeping to keep my leg straight? Also there is pain and some swelling in my right foot. There are some areas in my foot that are black in colour and a bit painful when I try to walk. What should I do? I have stopped elevating my leg while sleeping. My only medication now is Naprosyn 250 mg and Becosule. Please guide.