Hi Jo,
Yes, that kind of appointment can be extremely frustrating. I had a couple which were pretty close to that and left me with the impression that the rheumy wasn't taking things seriously at all.
Seeing her reports to my GP later, I could actually see that she was, it just didn't seem so at the time to me.
The good thing is that you are getting all the necessary tests done and you are going back in 6 weeks.
I would say that you'll just have to be patient until then and see what happens. Beyond that, if you are still unhappy it might be worth trying to get a second opinion even if you have to go privately initially to get some answers.
I'm sorry I can't help more,
Katharine