our lungs have a tendency to respond to the allergans from outside atmosphere, in a general any pollutant from outside which we inhale is going to irritate the lungs most likely your lungs responded to allergans (paint ) in your case in response to allergans from outside lungs produces large amount of mucuous , special cells called histamines are released in blood most likely it is an issue with the lungs and not your valves take tab augmentin duo for 3 days syrup bron q 2 tsf twice tab cetrizine 1 hs get a chest x ray done and tlc/dlc done if not relieved in 3 days plan for a 2 d echo cardiography thank you