Help what medicine do I buy for itchy throat cold and cough and pghlem?

Sugar100
Since 2 days today is my third day I have itchy throat causing cough. But today I woke up with less cough and itchy throat and now got a cold like sneezing runny nose. Sometimes I can’t talk due to phlegm. Yesterday I took a natural robutussin which is honey and ivy leaf which stopped my cough. So what medicine shud I buy today for cold itchy throat cough and pghlem? I couldn’t see doctor as they closed at 5pm and I woke up late.
Help what medicine do I buy for itchy throat cold and cough and pghlem?
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