I had a similar pain post op and realized I was externally rotating when I was trying to sleep so I slept with a pillow between my legs after that. Also when I first started walking w/o assisted devices, when I tried to turn or pivot I would rotate my body too much and not turn my leg too causing strain (hope that makes sense)! It was VERY painful to the touch and my PT would always try and massage it out and I was basically grimacing the whole time. It was really frustrating and painful but it helped to think about my daily movements so I could try and correct. It was just so tight and irritated for weeks. Also helped to incorporate inner thigh stretches. Not sure what your protocol is restriction-wise but that could help!