I think I figured some things out, but will still talk to my care team tomorrow. Sharing in case anyone has a similar experience -
When I was reaching up and turning slightly to the right with my arms above my head (same side as operative hip), the soft tissue that stabilizes the hip had to work harder than it was ready to at 5 weeks. Even though it was for maybe a second or two, reaching upward without the support of both legs caused some additional stress on things like the piriformis and iliofemoral ligament. The latter is one that I believe is cut using the anterior approach, and the former is one that I've had problems with in the past.
Collectively, I think the tissue that forms the hip capsule was stressed/strained, and that's what I'm feeling now. The mild leg pain and weakness, as well as the numbness in the butt after sitting too long, are signs the piriformis is upset. The discomfort deep in the groin and on the outside of the leg around the operative hip may indicate that other stabilizers are irritated as well.
There was no movement restriction for this kind of motion, and it didn't happen suddenly. It was a reach that required stretching in a way that turned out not to be ideal. But...no dislocation. I'm guessing that affected muscles, tendons and ligaments that stabilize the hip are well attached to whatever they hold together by 5 weeks, so I'm hoping this is just a bump in the road for the hip capsule healing process (which I understand take about 4 months in total to complete).
Regards,
-Doug