Hip/groin pain

I have a diagnosis of psoriatic arthritis which is fairly well managed with biologic injections. I have had pain in my groin for over three years. I have had every scan and test there is. At the beginning I was told mild arthritic changes and an osteophyte in my hip. The groin pain is triggered by sitting upright, driving, having my legs pressed together in bed. It is a sharp pain deep in my groin on one side. I have hip stiffness, low back pain on the one side and walk with a slight limp. Walking long distance causes the groin pain. The orthopaedic consultant has told me the pain is not coming from my hip. The rheumatologist says it’s an orthopaedic issue. I am at my wits end. I have no gynaecological issues. Nerve conduction tests were negative. I don’t know what to do next. This affects my daily living every day. The only thing that ever helped was a diagnostic local anaesthetic injection into my hip joint which stopped all pain for three days. Consultant said that’s meaningless as it would have numbed the entire area. Any ideas? Thanks for reading.