Hi welcome to Health care magic forum.
Thanks for choosing H.C.M.Forum.
You have Pain in the lower abdomen, below the belly button. It is periodical, Some times i feel like hungry, or vomiting
like. During period you get like this but you are not in period, or pregnant Some times you feel like farting. It is all going on since 3 days.
It is all appears to be due to urinary tract infection
, or stone in the bladder. Feeling hungry and vomiting like is due to gastric irritation due to infection, and related symptoms.
I advise you to consult an urologist
for diagnosis and treatment. You may need to have M.R.I. besides other routine tests for confirmation.
Wishing for a quick and comfertable recovery.