if you can send photos, videos, photocopies of investigation results, at least we can try to penetrate and suggest you something on critical care, if you do not have potent qualified small animal health care facilities at your area.
This is called tele-medicine too. One thing you need to do in absence of such facilities at your area, appoint one paravet who can inject, administer iv fluids and draw blood samples. Now send photos of your dog from different angles, try to capture videos with close take without missing its vital life activities like responsiveness to stimuli or its alertness, its movements that are present-- like its response to food and water etc. What more you can do, if you have veterinary pathological laboratory at your place or at your knowledge, just go for some blood tests. This may include cbc+diff, serum creatinine, urea, bun, serumna+, k+, ca++, lft, fasting blood glucose. Without wasting time, not to detain next treatment procedure to start you need to come out with all these promptly whether you are taking your pet to any hospital or consulting here with any qualified vet to initiate life saving attempts. But do not consult anyone who is not a licenced vet.