What Causes Dizziness And Mild Body Pain After Having Morning Food?

sir, i am not diabetic. just after having morning time food, which i normally take around 10 am, i feel sleepy and with kind of symptoms of mild body pains. after having sleep for about 30-45 min. i feel ok. but this is casuing my work schedule go out of order. i request for kind advise, whether this is any symptom of disease and also cure for the same if so. Thanks in advance. Krishna