Hello,
Welcome to HCM and thank you for the query.
Stomach bloating,chills, headache with fever can be caused by
peptic ulcer or
stomach inflammation or infection but should be evaluated further by clinical examination and some relevant investigations.
Peptic ulcer usually gives the pain 1-2 hours after a meal. Nausea and vomiting can be present. It is more possible if you take pain killers regularly.
Stomach inflammation can be caused by increased stomach acid secretion or
Helicobacter Pylori infection. Symptoms are usually similar to peptic ulcer.
I suggest you to do not wait anymore and visit your doctor. Blood work, abdominal
ultrasound should be done at first. Next step should be gastroscopy means upper GI endoscopy.
In a meanwhile please avoid fatty foods, spicy foods, fried foods, coffee and alcohol.
So,better to consult gastro-physician for further advise.
Hope this will help.
Regards.