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How are your menstrual cycles, do you bleed heavily. You probably are suffering from severe anaemia
which is due to decreased red blood cells and haemoglobin
in the blood. Do a blood test
for this. Regarding worms, you can get your stool tested. You must eat palak and other green leafy vegetables, nuts, which are rich in iron. You should feel much better after this. Kindly get examined by a Physician and also get these tests done, as you may need iron supplements
if severe anaemia.