Hello from a carer who has dealt with this.  Mum's chemotherapy will be specific to her and quite often sickness is not involved, just in case she will be given anti sickness medication each time she has chemotherapy to take home.  My husband dealt well with the treatment but got tired so if she's tired let her sleep, don't worry it's normal.  We bought a sheepskin rug to sit and lay on for comfort and you can get these on Amazon quite cheaply.  Food can be a problem but once again the cancer department will offer nutritional shakes, mine hated these so he ate what he fancied when he felt hungry.  Buy food she fancies, even if its chocolate éclairs, food is necessary to keep her healthy for the treatment.  Plenty of fluid and lots of care will get her through.  Don't fret the small stuff, it's not worth it!  Good luck to you all, Carol