Or it could be resistant chlamydia. It happens. I'm not an expert on trichomoniasis either, so I can't say. Is Azithromycin over the counter in Australia?
I've been to a clinic and I go back on Monday morning for test results. My concern is that two courses of Azithromycin have not cured this so its obvious that its something else besides Chlamydia. I am guessing Trichomoniasis but I'm not an expert. I'm pretty sure it's not gonorrhea based on descriptions of symptoms.
You should go to a clinic so that they can test it to see what it is before pouring more unnecessary drugs down your system (not against drugs, just that they aren't good for you if you don't need them).