Hi thanks for your question.
Feeling thirsty all the time along with frequent uninations are symptoms of diabetes
.Difficulty in swallowing along with sore throat
( inflammatin of throat) Pharyngitis can produce myalgia
(muscle and joint pain).
I would suggest you to consult a physician,who may be able to examine your throat to confinm pharyngitis as a cause of your symptoms.He/She may also get your blood sugar done to rule out or confirm diagnosis of diabetes.
Hope this answers your question.