Dear ranjithayakkat,
I am assuming that the doctors have ruled out
pregnancy !
Pain in the upper stomach , especially recurrent and related to
ingestion of meals may indicate beginnings of an ulcer in the
stomach. Since the pain was relieved by taking simethacone
and an antispsmodic medicine, problem could very well be
related to excess acid . Your wife would need to see the
doctor who can arrange for x-ray series of her stomach and also
send her for stool and blood tests. If the pain does not respond
to medications , she might need further investigations including
gallbladder sonogram and perhaps a scope examination of
the stomach to detect ulcer.
Good luck,