Hi ...I can understand and empathize with your situation, however I am sure that in your country, there is provision of free or subsidised Govt hospital or health care facility, wherein you can first take few basic tests like
thyroid,
liver,
kidney, pulmonary profile or tests, inclusive blood tests like
sugar, haemoglobin..
These are mandatory....only taking medicines will not help, and the medicine which helps are far far more expensive than basic healthy food.
So please eat normal rice , fish( found in sufficient amount in Bangladesh) and inexpensive fruits like banana and also 1 boiled egg daily..