Where are you located? If her droppings are watery she can dehydrate easily can you get some Coconut juice or half gatorade and half water into her? You may want to try spoon feeding some warm mash to keep her energy up. Yes Metacam is an anti inflamatory you may want to ask a Vet by phone if Benedryl may be helpful-do not dose on your own. Sick birds can succumb to dehydration so do get her to drink, eat grapes or what ever you can tempt her with . Do keep trying to find a good avian Vet even if you have to call them for help due to distance.
1) YES somewhat
2)Not convinced
3)serious
4)get some help now, birds have very little reserve energy to fight with
5)Yes do push foods and liquids, tempt her with treats and keep her warm
6)Add a clean mist vaporizer with no additives just water or take her to the bathroom with a hot steamy shower running & see if that eases her breathing. (Do not put her in the shower)