Sclc complications

my mum was diagnosed with SCLC on 11th Oct had her first cycle of chemo carboplatin and eptoposide on 21st oct none since due to sickness diarrhoea then chest infection then weakness has been in hospital twice now first time 2 weeks out gor a week now 4 weeks and now in a specialised hospice on hospital grounds who have advisedher platelets are pretty low snd her potassium is low before her sodium has been low but that seems to be ok now please help if anyone has or is going through the same i need some hope! Im falling apart and my poor mum is so weak and lost weight thank you in advance.