I had horrible groin pain before hip replacement, went on for several years because nobody looked at my hips, I was petite, and only in my 50's. Couldn't even walk up the stairs properly - finally, the pain doc said it's not your back, let's get some images. And he sent to an ortho that said I had the hips of an 85 year old.
Haven't had groin pain since the surgeries almost 20 years ago. It also resolved knee pain and back pain from bad gait and limping. But my SI joint can get pretty sore if I'm not careful to keep it stretched and to sit properly.

Are you contemplating hip replacement? I have never regretted getting rid of the pain.
Sue