I had to get an appointment a few weeks ago - my DD was still really sick and lethargic more than two weeks after immunisations and I was really worried about her. When I rang asking for an appointment for my sick, six month old I was told sure, how about 9 January!!!! I got the nurse too when I said that wasn't good enough. I was pretty grumpy with her too and eventually got an appointment for the next morning. Told my doctor (who has been my GP since I was 11) and she was so upset. I know she's really busy (and I'm sure doctors in regional areas are just as busy), but surely they should be keeping at least some appointment times free each day for when people actually get sick!! I hope the letter works for you and you don't have the same problems in the future (and I hope your little boy's rash clears up)