Soar throt, some time blocked nose.

I have soar throt since last 35-40 days approx, I took some medicine by physician, like cenarest, and some other. Then I talked to ENT specialist , he gave me 10. Days antibiotic course . Its relife in my soar throt but still not fully resolved. Some time in night I feel quite nose blocked, but in morning it's feel good, past 2 days , u feld mild pain in chest, like cremp, or khichav in muscles. I have no travel history,no covid contact. last 1 month+ fully quaretine, . No fever, no cough. Inspite of this,My doubt is . Is there covid test required? And why it's getting long to soar throt to settle .and fully resolved. And my question is,in  how many days maximum covid symptoms come out, and what are those mostly. As I herard fever, cough and shortness of breath. Apart from this. Is only 1 symptoms , possible to confirm covid. Becoz I am living with my 11 month baby, so it's very necessary to me, confrim is it covid or viral flue infection.etc