From your symptoms, it sounds like a hip problem. That would radiate if pinching nerves to everywhere you mention. Prostatitis isn't a disease, it's a description of an inflamed prostate but doesn't tell you why it's inflamed, which would be the disease state. For example, it can be inflamed from an infection, cancer, an enlarged prostate from aging, etc. To diagnose that, your doc should at every exam be checking it with that wonderful thing they do at every physical. It would also show on an ultrasound. If it's infected or the like, you would be sent to a urologist to tell you that. If it's something you injured at some point, you would be sent to an orthopedic surgeon, who would do some manipulations of your body to see if any movement made it hurt and probably do an X-ray to check for osteo-arthritis and MRIs to check for labrum tears. If it's the periformis muscle, that doesn't show up on any diagnostic imaging but would probably manifest more down the side of the leg with sciatica, but it can be a problem. So if your docs rule out any disease state, you're likely headed for physical therapy.