i think you go for your complete blood count
by which you can know about your cholestrol
level also. if your blood pressure is high may be due to high cholestrol this will confirm after test.
You can start medicine losartan plus amlodipine
No these are not symptoms of diabetes.
keep hydrated herself by drinking plenty of water.
for sore throat
you can use Cefixime 200 mg tablet twice daily for 5 days.