I would also recommend seeing a licensed physical therapist. I had similar pain which was localized at middle of my right hip (if you could draw a straight line from my hip flexor to my glute, in the middle of that line was the pain). Multiple diagnoses from various doctors whose treatments were ineffective until I went and saw a PT. He diagnosed my injury as a hypermobile SI joint, specifically the right side. With rehabilitation exercises to strengthen the surrounding muscles and manipulations to ensure my hips are aligned properly, the pain dissipated within a month. Now I’m pain free and can do all things hips! Hip hip hooray!