Hi Jan,
Hopefully the secretary will get back to you with an appointment, it sounds as if your knees maybe need aspirating ,they usually put steroid in when they do this and it's very effective.
You could ring the NRAS helpline for advice on the care (or lack of!) you are getting.
Hope you get some help soon.
Love Doreen xx
PS have you tried ice on your knees? 20 minutes on, 20 minutes off, see if it helps.