Dear Kia. This is not contagious. You probanbly have had temporary abdominal bloating
with cramps or some abdominal wall nerve
was pressed. If CT scan
showed nothing the you shouldnt be worried. You could have some stomach disorders such as gastitis,ger dor hiatal hernia
. this can cause such pain,especially after meal. So i recommend to do gastroscopy with stomach biospy and the some drugs can be prescripted.
Wish you good health.