Scratchy Throat. Are not being enough?

I tested positive for Covid last week. I had no fever, initially for 1-2 days had sore throat, a broken voice and little cough. But as few days passed, my throat is not exactly sore but feels more scratchy, and there has been quite some coughing (I do not generally have a coughing issue, although I tend to get a sore throat quite often). I gargled with Betadine for few days, and I take Strepsils tablets once almost everyday. It gives me only temporary relief. I also had cold and a stuffed nose but that is slowly getting better. It's been almost a week and the coughing isn't reducing. The scratchy feeling in the throat is directly inducing the coughing. It's not like I am coughing all the time. But once in a while the throat feels very pricky(like it happened in sleep today, all of a sudden) and results in coughing. I could only go back to sleep after taking a Strepsil. So, what should I do? What medicines should I take if the usual Betadine and Strepsils are not being enough?