Your girlfried seems to have caught a viral or bacterial infection, which explains all the symptoms. When the own body is hot (fever) the surrounding feels cold, thereforde she is freeezing. She should have medication against vomiting and amply peppermint tea in little sips. She may put in a lot of sugar in her tea but please fo not try to eat anything until she is better.
She should be better tomorrow and nearly healthy within three days. If not or if she is getting worse she should see a doctor.
I wish her the very best!
That is what I meant with "medication against vomiting": Dimenhydrinate can help.
You've read my last answer but didn't rate positively yet. Is anything not quite clear?