Is it normal to be very thirsty so much so your throat hurts terribly when u swallow and with some water it gets better.?
No. Extreme thirst can dry out the back of your esophagus but should not cause significant pain. If you have pains you might have an infection either bacterial or fungal (thrush).
No. It could be sjoren syndrome or dryness secondary to medications for the bladder (anticholinergics, antihistamines, anti depressives, use of diuretics, lack of vitamin a. If you are thirsty check your sugar levels to rule out diabetes.