@bdpp- Good morning. Ground glass is a description of what part of the inside of your lung looks like. https://www.med-ed.virginia.edu/courses/rad/hrct/groundglass.html (The site wouldn't let me copy the image. Pneumonia can be quite an invasion to your lungs, as cited by your symptoms so I hope that you are taking it easy, drinking plenty of water and eating as healthy as you can.
ground glass opacity (GGO) is a nonspecific finding on computed tomography (CT) scans that indicates a partial filling of air spaces in the lungs by exudate or transudate, as well as interstitial thickening or partial collapse of lung alveoli.
I hope that your symptoms abate very soon so that you can get on with your treatments.