Welcome to Healthcare Magic
You are probably suffering from gastroenteritis
. You need to rule out infection like Typhoid
which can present with that kind of rash
. Kindly consult a Doctor, get your stool tested and take required treatment which may include antibiotics. As of now take ORS in sips to avoid vomiting
. If you aren't keeping that also down and feeling very weak, you need to be taken to Hospital for IV fluids.