Thanks for the query,
I have noted your problems.
I am sorry that i donot know if she is on a urinary catheter which predisposes to urinary infections in patients with stroke
Basically we need to exactly pin point the type of infection in her so that she will respond to antibiotics. This can be done by urine culture-sensitivity test, culture for sputum and X ray
chest. These tests will be helpful in selecting the proper antibiotic and she ill improve.
Please check if she is on any medicine that can cause low sodium like hydrochorthiazide etc. This is one of the common cause of low sodium. Stroke per se can cause low sodium
Please consult a local physician who will guide you through investigations and treatment
Hope this clarifies