You are early in your recovery phase. Sleeping in a recliner may be bending your knee too much. It can get stuck in that bend. You need to try to flatten your knee as much as possible (0* extension in Physical Therapy). This position was very hard for me from the get go.
And I was told to sleep on my back to keep the knee straight as it was healing. Ice machine, eye cover perhaps, pain medication as ordered. It's the hardest surgery to recover from and truly it takes up to a year to recover!