What Can Be Done I’ve Had A Pretty Bad Cough For About 3 Weeks?

Question : Hi! I’ve had a pretty bad cough for about 3 weeks now—it’s a wet cough that occasionally produces phlegm (thick white or very light yellow). I’ve also been congested but have not noticed any other symptoms aside from the cough and congestion/runny nose. I have reddish bumps along the back of my throat, and small (almost the size of the tip of a needle) white spots on my tonsils—I know for a fact theyre not tonsil stones as I’ve experienced tonsil stones in the past, and I don’t believe it’s strep or bronchitis as i’ve been in close proximity to many people including my boyfriend and ive yet to hear of anyone getting sick or developing the symptoms that i have. When this cough happens, its more aggressive at night and i can feel it deep within my chest. It’s usually in spurts of 3 (COUGH cough cough, COUGH cough cough) and can get violent enough to make me gag and almost vomit...it sometimes causes a burning sensation within my chest as well. I thought it was just allergies at first, but it seems to be unwavering and continuously bothersome throughout the last 3 weeks ive had symptoms..