I am very sorry to hear about Maggie May. I am a veterinarian and will do my best to help.
The pale gums are very worrying. She could be bleeding internally ( any chance of her getting into rat or mouse poison?), she could have a very heavy burden of internal parasites, or she could have a disease carried by ticks or fleas.
The bloated stomach could be fluid, or blood. Could she have been injured or fallen?
The high heart rate and respiration are probably a response to being anemic, not enough red blood cells to carry oxygen to her body.
What do you do with emergencies where you are? If she were mine, I would be checking to see how low her red count is and giving a transfusion if it is below 12%. I would start vitamin K1 in case of rat poison. I would check for parasites, and start doxycycline in case of tick or flea borne disease.
It is heartbreaking to hear of a sick puppy so far from the help she probably needs to survive. The pale gums, to me, are a sign she is probably not going to make it without medical help. If this were happening to my own puppy, I would not be able to help her at home; I would have to get her to my clinic.