 [ Symptoms ] i recently took antibiotics for an ear infection for a week a few days after i got bad stomach cramps & loose stool hi i took zithromax z pak antibiotics for an ear infection for about a week a few days after i finished taking them i began to have painful stomach cramps and loose stool what do i have and how can i fix it  thanks [ Disease ] hi it seems to be related to heart and not the lungs the heart can be enlarged due to variety of reasons like valvular heart diseases pulmonary hypertension etc i suggest you should consult a cardiologist and get the necessary investigations like ecg echocardiography angiography done thanks