Hey there!
I would hazard to guess that the pain you were feeling was your body’s way of telling you that it is adjusting to the new hip. To protect the hip, other muscles are picking up the slack. Glad you felt better after a couple of days. You need to listen to the body and the hip. When your body tells you to take a break, be sure to take a break. After a little rest, try again. Over time, you’ll need less and less rest. It’s a process, but you will be back to running.
Hip Brother Tom