Nurse here checking in with a couple of thoughts. The cough you are describing is concerning. A dry cough as opposed to a loose congested cough may indicate a lower lung infection as opposed to upper lung. This is a symptom and concern with Covid-19. The fact that you cough more in the shower indicates that the humidity is loosening up the congestion in the lower lungs and is your bodies way of trying to expel it.

You can do many things to improve your condition with natural anti-virals talked about here as well as nebulized or inhaled food grade H202 and or sodium bicarb (please research this carefully and understand the percentage and small amount needed). Humidity several times a day - steam up the bathroom and sit in there. If you have someone that can perform gentle chest percussion with cupped hands on your lower lungs that will help loosen the phlegm so you can expectorate it. [link to www.youtube.com (secure)]

If you start getting any worse get to the ER. Don't expect the medical professionals to be on top of this. Your own actions right now may make a tremendous difference.