Some swelling and soreness are normal at this stage, especially if you are trying to return to normal daily activities and you are standing/sitting without elevating the leg quite a few hours a day.

We all want to think we will mend instantly, but hip replacement is a big deal - your body has been assaulted, bones cut, muscles and nerves separated or cut, blood has been lost - healing takes time, especially if you have any other health conditions. Swelling is your body sending out fluid to "bathe" the injured tissues. To reduce it, the swollen body part must be elevated above the heart, and the fluid will flow back toward your torso, where it can be eliminated by the kidneys. If you have someone who can massage from foot toward torso for a few minutes a couple times a day, while the leg is elevated, it will help. And until the swelling is gone, always elevate foot and leg when seated. Even in a recliner, add a few pillows to raise the leg even more.

The "acetabular" refers to the acetabular shell inserted into the socket where the hip joins your pelvis. These are fitted into place a number of ways, depending on how much damage is there to begin with. Rarely, the method of fastening doesn't work well and it may loosen. This finding by the radiologist, combined with your swelling, means your case should be reviewed by the surgeon, not just the PA or assistant.

If I were you, I would call and ask for a direct consult with the surgeon. Are you able to do that?
Sue