Hi ive been prescribed erythromycin 250mg two to be taken four times a day this was on Thursday its now saturday and so far I have had trouble breathing at bed time, diarrhoea, vomiting, dizziness, loss of appetite , stomach pains and stabbing pains at the bottom of my breast bone the diarrhoea has stopped but all of the above I still have. The stabbing breast pains are so painfull and rather concerning im not sure what to do please help dawn