Go back and ask for a referral. Either to the physio dept - who will do a lot of movements and be able to help diagnose, or to the orthopaedic dept of your local hospital.
I had mild SPD in both of my pregnancies. Then when DD2 was about 5 I started having proper problems. After ignoring it for months hoping it would clear up, I turned up to my doctors with sticking, clicking hips causing me pain that meant I couldn't walk on my leg sometimes. They were useless.
I was sent for xrays and blood tests to look for arthritis. They told me all was well.
When I went back to complain that I was still having pain, they told me I could self-refer to the physio dept.
I did physio which made things worse and they referred me to the hospital.
The hospital referred me back to the physio dept.
More physio again made things worse.
They referred me back to the hospital.
I was finally sent to an orthopedic surgeon who looked at my then 3 year old x rays and pointed out the impingement he could clearly see. I was then sent for a steroid injection as a further diagnosis. When it gave only temporary relief the surgeon decided I needed an arthroscopy. I'm having it done in 2 weeks time, nearly 4 years since my xray and about 5 years since the onset of symptoms.
There's no such thing as being too young for hip problems. I was 30 when mine started. Treatment now will hopefully put off the need for a full hip replacement in future.