I've been dealing with congestion, a lot of phlegm, and a cough for about 10 days now. I took a COVID test right when these symptoms started, and it came back negative. I've been steaming about 6 to 7 times a day, but things aren't really getting betterthey're just staying the same. What should I do next?

That looks like Lower Respiratory tract infection,get a chest xray done and visit Pulmonologist for appropriate management, consume balanced diet and maintain healthy lifestyle