Recovered post covid-observation queston

My mother was diagnosed Covid positive on 19th march 2021. Earlier, she had symptoms of fever,wet  cough, extreme weakness/tiredness and lack of taste since 10th March 2021  . She had Covid Pnemonia with CT score 10/25 and was admitted to hospital , treated for 5 days with steroids and other medicines, discharged on 24th March 2021 after that given medicines for a week. She has following observations and questions below. Observations... 1. Oxygen (Spo2) is normal 98, temperature also normal (no fever) 2.Early morning some cold and nose block along with sneezing. 3. Mucas (white) coming out from throat last 1month even post discharge from hospital . Questions 1. Not using AC (Can she use window AC ?) 2.No medicines taken after initial set of medicines (1week post discharge) got over. Should any medicine be taken? Any other recommendations?