Welcome to HCM!
I have gone through your query and from that I think, had I been treating you, I would first go for routine blood tests and ultra sound
abdomen to check the status of all organs and once they are seen to be within normal limits, your case can be treated as ISB. but first we have to rule out other causes.
I feel that till you see a doctor, it will be good that you take some good antacid
and antiemetic along with an antispasmodic for your nausea, indigestion
and pain in abdomen. in my experince I have seen that a combination of rabiperazole- domperidone
twice a day, half hour before meals, and dicyclomine
are effective and good.
You should abstain from oily and spicy foods altogether, avoid eating food and drinking water from outside home.
Though it is early to say before you get a blood count report , but your doctor may give you a course of good antibiotic, which can help you in curing a long standing, chronic- abdominal infection, which may simulates similar presentation.
Hope you get well soon! Do see a doctor.
Feel free to ask mores queries.
Dr. Manisha Gopal