The ant that bit me was called Paratrechina longicornis or the longhorn black crazy ant. It isn't deemed a pest species here and poses no threat to the general public.
They don't have a stinger but likes to bite and swing its abdomen around and squirt a formic acid solution into the would its making as it chews. Normally placid I inadvertently disturbed its new nest and they defended it well.
After I emailed you the rash spread to inside my nose and inside my ears and by the afternoon I had a nose bleed. Saturday night I woke up with breathing problems and my heart racing but thought it was from the steroids and stayed calm and did manage to go back to sleep. Sunday morning I woke with the taste like I had been sucking on coins or metal. I took my dose of Phenergan and slept for most of the day. By that afternoon I had issues swallowing but as it did not get worse and I could still breathe I again stayed calm and kept taking phenergan and Monday I went and made an appointment. Tuesday the rash was now just on my arms and talking to the doctor he informed me the symptoms with my breathing weren't from the steroids and I should have gone to the hospital though he did praise me for staying calm and not panicking.
I in the past, I have shown an allergic reaction to an ant they call the Bulldog ant or Inch ant. Its a native species and considered a venomous ant and as I found out, from the same family. They took this into consideration when I went back in to see them.
The Doctor I saw at that appointment and the Doctor who treated me the Thursday, both recommended that I need to have an epi pen and also advised me to get a medialert bracelet or something similar for in case of anaphylaxis.
I have been given an epi pen and steroids and have been told to avoid any ant as most in Australia are of the same family Formicidae. They think it is to do with the formic acid the ants produce.
I just have to call the exterminator to spray my yard and house as well as wear closed in shoes and use insect repellent and be a little bit more vigilant when I go outside.
I still have a couple of rash patches but they are now not as maddeningly itchy and getting smaller by the day.
Thank-you for your advice as it did help to keep me calm and hopeful.