That sounds like good news Gaz!
Ah, now that is sounding very similar to a problem that my ex suffers from ...
A few days after overdoing a stretch, she suddenly suffered 'hip pain' so bad that she had to crawl across the floor to the phone to summon help. It took months and many visits to the doctor before a referral to a physiotherapist came up with the answer. The pain was experienced in the hip area but it was actually being caused by damage to the Psoas muscle causing extremely painful spasms -
read this.
Obviously you should still seek professional advice, but that information might give you a head start and save you the kind of delays that my ex had to suffer! She now has some exercises to do to keep her pain-free. (I imagine that she is doing them today because the problem flared up again yesterday when she carried a heavy armchair upstairs without help!) It wouldn't hurt you to try some of those exercises and see if they help.