I had bilateral surgery and was also on my own to recover. At first I felt fine as long as I laid very still. I found that the PT's were too pushy and in way too much of a hurry. It really hurt me to walk for the first few days. I was okay with the exercises, but I chose to do the lowest number of repetitions. The marching they're having you do concerns me. That can really hurt the hip flexors.
I had a good cry on the second day, and it was a relief to just let out all of that negative energy. I think it scared the nurses, but I just let myself bawl. Tears are truth, and crying can be healing. It seemed to me that the people in the hospital didn't have a clue as to how intense this surgery is. They gave me Tramadol and Oxy, too, and the Oxy gave me tremendous relief from the pain. It's good that you're taking them on schedule.
I think you're doing fine. My dad stayed with me for two nights after the three nights in the hospital. I had two walkers and a commode. I slept on the couch at first, with pillows for elevation. I had done a lot of strength work before surgery on my abs and arms. It helped with getting out of bed.
I hope you get the assistance you need. Some rehab centers are excellent. There's plenty of time for PT. That can make your pain skyrocket. Yoga breathing and rest can do wonders.