why doesmy stomach rumble when my gi doctor say i am clea?

[food man]

i have had an uppergi that showed that have zero internal ailments. my labs for calium came back clean i am in school and it is super embarrasing that i rumble to the point that i have to cover it up wih a cough. i am a 31 white mail who drinks a beer before bed and runs around 3 miles a day after my 1 hour workout of all muscle grop