1Catherine1, you have sterling service GP and physio in your area! Round my way, the waiting list for physio referrals is so long, I would have had my baby by the time I got physio appointment... MW's no use either. There was support for severe SPD, but not for anything else.
Depends where the OP lives as to what's available - NHS is a postcode lottery for this as much as anything else.
My sore hip episode also only lasted a week or so (I think around week 22/23), but I got treatment for it, and was very strict then about posture, exercises and treating at the 1st sign of pain from then on rather than waiting until it got worse. The pain relates to surges of relaxin, the hormone that means your joints, esp around the pelvis, are more vulnerable to getting out of alignment and tendons/ligaments etc are more prone to strain and getting overstretched. So you more likely to get hip and pelvis pain at certain times - but if you don't treat it, it can become a chronic problem, regardless of when hormone surges are. Remember throughout pregnancy, your weight and how you balance it is changing ALL the time, and that's quite a challenge physically.
However, my advice FWIW is get it looked at sooner rather than later. If you wait until another episode of more intense pain, that actually limits what a physio or a chiropractor can do. Which is basically massage realignment to help straighten you out a bit, and then exercises to stop you straining vulnerable areas. It can help a huge amount, but tinwe, if you've had one episode, or are having some pain now, personally I would be active about addressing it now if you can.