Can little dust cause chest tightness? the weather was cold though & i feel sour taste in my mouth.acid reflux causes it? how to relieve symptoms?

Maybe two things: Dust can cause chest tightness in someone with asthma. Cold can also trigger asthma. The sour taste may indicate reflux all the way to the mouth. Reflux also can cause chest pain or pain between the shoulder blades. Reflux can trigger asthma symptoms. First get help from a doc separating the issues. For reflux start an antacid and avoid heavy greasy food and late dinner. There are surgical options