Reading your 5 month update, if your pain is 1-2 described would put in category of 'discomfort'. Sometimes after tissue has completely healed you can still get some discomfort/pain. When you break up scar tissue / tissue adhesions exercising, it can cause discomfort/pain.
Matter of fact, exercise itself breaks down tissue which causes inflammation, which can cause discomfort/pain. Its called delayed onset muscle soreness (DOMS). That said, the idea is for the muscles to heal over 24-48 hours so they can handle additional load. Better, stronger, faster etc.. you get the idea...
I was out doing yard work yesterday. I felt discomfort today for sure, so just walked my dog today for some exercise. Now late in the day feel fine with niggles of 1-2 here and there...
For you? You are describing something pretty specific. 100% you need to schedule an appointment with your Ortho to give you the assurance you need.
Think about it: at 5 months out, even if I confirmed it was normal or
@Mojo333 did, did that person confirming it have anterior or posterior surgery? Did they have a single or double hip replacement? Did they have the issues you did for 9 years preop? Are they 39 like you or like me and many folks here 55 or 60+? All things that make your situation unique and in need of some hands on advice.
Final thought: early days after surgery comparing notes helpful and yields great advice. After three months, worth checking with folks for sure, but for the discomfort pain 1/2 you describe most people would quietly admit (I think) they experience the same thing for quite some time up to a year and beyond.
Food for thought, be well.