I have asthma and i've been experiencing shortness of breath and pressure in my chest when i'm doing activities and laying down.for a week ?

Asthma exacerbation: It sounds like your asthma has gotten worse in the last week. It's time to visit your doctor to update your asthma action plan so you know what you can do when your asthma gets worse. For now, use your albuterol inhaler more often. Maybe you need a second inhaler for a couple of weeks until things calm down again. Good luck.