Hi, I had gone through your question and understand your concerns.
First of all , all the organic causes of your symptoms should be ruled out. I suggest you should have USG abdomen , stool r/e,
esr ,Tfts, cbc, rfts , lfts ,
CXR and stool for occult blood testing. So to look for any other possible diagnosis. Taking just over the counter medicine is of no help. If all these tests came out to be normal than i suggest you should have psychiatric consultation also as it could be
Post traumatic stress disorder but this is very down the list after ruling out all diseases. If i were you doctor i would like to do physical examination and i would like to have complete history and all these labs done .
Apart from medication you can have lifestyle modifications that can help also:
High fibre diet, green leafy vegetables, fruit.
Cut down the processed food. White bread, doughnuts, white sugar, pizza should be completely avoided.
A 40 minute physical activity every day like morning walk, evening walk or a visit to the gym or swimming pool.
Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate to ask. I will be happy to answer your questions.
Wishing you good health.