I sympathise with you re the long wait to get into a Paed. My DD's appointment is the 26th Oct... and I booked it nearly a month ago!
One of the Mum's at my mother's group sees Ian Rowlinson at Bundoora. She loves him. I have also spoken to a Paed at work who highly recomends this guy... Problem is the waiting list.
As Salsa said, your GP should be able to get you in quicker. My GP was also reluctant to give me a referral but I didn't give him much choice. Give them a call and tell them your child needs to be seen sooner rather than later due to the reflux and can they please contact the Paed's rooms to get you in quicker. If they refuse, ask why.

HTH

MG