Hi.
Thanks for your query.
Noted the history and understood your concerns.
Feeling ill followed by feeling feverish, diarrhea, vomiting and rash on the body is indicative of
Gastroenteritis with septicemia giving rash on the skin.
This can certainly occur due to bacterial as well as viral infection called
stomach flu.
Some treatment is common for both the conditions viz, probiotics, symptomatic treatment like that for fever, nausea, vomiting with
Paracetamol,
Domperidone and a PPI like Omeprazole.
Supportive treatment with multivitamins, electrolyte solutions..
Get the stool and blood tests done and if there is an infection of bacterial origin as proper course of an antibiotic,
metronidazole can get the cure.
If this is due to viral, symptomatic and supportive treatment should suffice.