Day 9 after testing positive

I'm confused. I say I'm fine on mornings then later in the day phlegm annoys me and the day turns into a coughing mess. Things are calm today so far and I started a new medication for the phlegm as it is my only problem right now, I'm literally scared to eat lunch because I don't want this thing triggered. I'll try to eat still though so I can have the medicine. Besides this problem, everything else feels ok.

I'll most likely get PCR done on next Monday. It's kinda expensive so having it later is a good idea, because I only want to do it once.