cristy collins worked for the tasmanian ambulance service in launceston .
she used to drive the ambulance and treat patients while high on ice .
30-year-old , who is now clean , was never offered support by hospital staff .
post traumatic stress disorder from her service in iraq and borderline personality disorder both fuelled her drug addiction .
ms collins has shared her story in an effort to raise awareness of the damaging drug and the lack of support available for addicts seeking help .