Shortness of breath is a "biggie" for anyone, anytime, and is not a symptom of the common cold, or even the seasonal flu, usually. Condisider the inability to "catch your breath", "inability to adequately Exhale" after minor exercise or stair climbing, as a serious indicator of big trouble.
Specifically noted as present for serious C Virus 19 sufferers, a precursor for many with 'pneumonia', and a indicator for Heart Failure... no fun, take seriously.
Having said all that, I did not see 'shortness of breath' in Lois' statement about her symptoms. Hope you get through this well, Lois.