Pain radiating from front to back with vomiting is not to be taken lightly.
Get a proper consultation and investigation mainly USG whole abdomen and CBC, serum amylase.
It can be anything from simple gastritis to pancreatitis.
Provide more information about your bowel habits and duration and characteristics of pain.
Next Steps
take ORS, water
avoid spicy fried food.
take probiotics
if vomiting persists, consult immediately so that proper medication can be given.
Health Tips
take rest and take sips of fluids and watch for increase in pain or vomiting.
if all settles still get it investigated.