I'd be genuinely shocked if I survived any war as my survival instincts aren't the greatest and I'm not particularly well adapted to surviving in the rough. I'd probably cry for a long while and then realise that I was only furthering my dehydration, which would make me even sadder. I'd probably start going scavenging and hoarding stuff, crying every time I found some semblance of a human life. I hope I'd still be in the area that I am, as lots of foods grow naturally here (very fertile) and there's lots of rain (so lots of fresh water). If there were any pharmacies left I'd probably just go source out a bunch of pain meds and kill myself, to be honest. I'd be embarrassed to be humanity's last remnant.