Hi @amytro. You sound very normal to me. I had my TKR in May 2018 and it I was sleepy as well. I think there were a few reasons for this and I believe I read about this as well. First of all surgery is a trauma to the body and sleep helps it to heal. I woke up a lot a night because I was uncomfortable. I hated that immobilizer that they make you wear. The compression stockings and the immobilizer made me hot. I am also a side sleeper and hated being on my back and not being able to bend my knee. Because of the way I had to sleep, I was not as comfortable and not as rested when I woke up. Doing PT wears you out!! For a while I would go to PT, walk in the door, and collapse on the couch. Also, getting around after a knee replacement is a lot harder. It takes a lot more out of you. Then the pain meds made me tired as well. It takes a while for you to build up your stamina. I had the pleasure of falling and landing on my shoulder while recovering from my TKR. So I had to have another major surgery in October to repair 3 tendons and a torn bicep. I am sleeping better now, but still not where I used to be. I still have trouble getting comfortable at night and I need a nap most every day. And now I am getting ready to schedule the other knee. One of these days I hope to get back to a normal sleep pattern. LOL!! Hope you get back to your normal sleep schedule soon!