Hi welcome to Health care magic forum.
Thanks for choosing H.C.M.Forum.
You had swelling and pain in the lower abdomen, appears to be gas pain, after eating white pasta, and bread. You are suspecting
gluten sesitivity.
First of all you had swelling in the lower abdomen , so it appears to be the subcutaneous swelling, due to
abscess or
cellulitis, with collection of pus. in a few days you may see a pus point.
If you have any change in bowel movements, or burning in the urination, you can suspect
abdominal pain, gas may be there even with abscess like infections due to
indigestion.
I advise you to consult a surgeon for diagnosis and treatment. By physica examination the doctor will confirm the diagnosis .
Wishing for a quick and complete recovery.
Best regards.