I’m not a Dr. - but I’ve raised 3 kids. Strep throat causes white patches on the throat - that’s one of the means of diagnosis. I don’t remember seeing the uvula affected, but maybe. Strep is usually self-limiting, lasting about a week. It’s treated with antibiotics, but you live in the land of SARS, and taking antibiotics unnecessarily, or for too short a time makes bacteria resistant with sometimes extremely serious results.
If it were me, I would not take antibiotics, but just wait and see if it clears up by itself. If chloroseptic or listerine, etc. are too hard to find or too expensive, gargling with warm, mildly salty water will help - as will taking aspirin. You can also gargle with aspirin by dissolving it in warm water - I’ve found that helpful sometimes.
You do need to monitor yourself - if you feel that you’re developing a high fever, or other serious symptoms, please get help. Through the US Embassy maybe?