It seems like I caught a cold, it got much warmer outside suddenly, an…

It seems like I caught a cold, it got much warmer outside suddenly, and I'm in a down jacket, all sweaty, on the next day phlegm flows, they've been going for two days already, I don't know what to treat them with, I used drops several times when it clogged up, at 3:30 pm I drank some kind of solution Max, still feel like I'm starting to get sick, I have an appointment with the doctor at 9:03 am, what would you recommend?