wife recovering from treatment

Hi all,

 

My wife was diagnosed 13/3/20 with tonsil cancer, theres probably a medical term. After several scans and report of spread to lymph nodes in the neck, she had tonsils removed very quickly (cannot fault the NHS) 

 

She is home recovering but sleeps as much as 20 hours a day, i can only presume this is normal, has anyone experienced 

 

Thank you