What Is The Treatment For Nausea And Vomiting?

Hi there, for about a week I've had dizziness, light headedess, and feeling weak. I've also been extremely fatigued with it all coming to a head today. Today I could hardly walk due to feeling faint, I can't concentrate and feel bloated and nauseaous, I vomited and can't eat. I feel I have no strength... I currently take iron supplements, vitamin c, Zink and no other medications. I don't smoke of drink or have any other health problems. I lead an active life but probably quite stressed and have been known to suffer from insomnia and anxiety. I'm a 29yr old female and not pregnant.