So sorry to hear you are going through this. I almost had to go to Rehab as well but thankfully doing well at home 3 months after my first surgery. I know it is hard but you need to move as much as possible and allowed by therapy. I think that is why after 3 months (still with an articulating) spacer) I am independent in all of my ADL’s except tying my right shoe. My Doc and Therapist have been amazed at my independence. Although I was fiercely independent before this and I hate asking for help. I walk (even if it is just around my house) at least every hour and now am able to get out and about but do need help with transportation for now. The first two weeks after surgery are grueling in terms of pain. Ice packs and hot showers were my saving grace. Gabapentin and muscle relaxers have also helped so see if your Doc will call those in as well. Most other pain meds were too constipating for me so unless I was in excruciating pain I avoided them. Good Luck.