I know you said you'd rather not, but if you're unable to drive to your GP you should probably call an ambulance. You know your body and if you're not feeling well, it's much better to err on the side of caution. All they can do is send you home if you don't need to be there. Alternatively, do you have anyone else that can take you down to your dr?

If you'd like to call and speak to a registered nurse, call 1800 022 222. It's a government funded health service that will assess how quickly you need to see a medical professional.