welcome to HCM.Glandular fever
is a viral infection which is usually self limiting, and is characterized by fever, swelling of lymph nodes, pharyngitis
is usually not seen. Anyway, I suggest you get a prescription for an antiemetic which can be given before food thrice a day. Feed her small amounts of fluid foods like thin soups, rice water etc which she can tolerate every 2 - 4 hours. Give her sips of water as much as she can take. I wish her a speedy recovery. thanks.