My chest is congested, sometimes chest gets tight that i cough a lot, stuffed nose, can't taste anything, and i have a cough. what could it be?

Bronchitis/asthma: Heavy amts of mucous, chest and nasal congestion suggests bronchitis perhaps triggered by allergies or infection. If the mucous is discolored, think infection. The tightness in chest is brought on by the work of breathing required to create enough negative pressure to inflate lungs through this airway congestion. Typically these are short-lived although if persistent, asthma might explain it.