What should I do if I buy medicine in a small clinic with a cold and fever, but I don't know whether it is COVID-19 health code or green?

This has nothing to do with health regulations and your sudden fever. You haven't been to the hospital or anywhere else because you have a fever. Did not reach the high-risk area, so this health code is still green. Now that you have a fever, go to the drugstore to buy antipyretics. We must put it on record here. We must have an ID card and scan the code.