How do i avoid embarr moments like farting?

I suffer gases in my stomach bcoz of the diet i make though i am skinny i fart like if something has blown and today while i was using the stairs in my father's house i did give a big one and i believe that my father heard it bcoz he were down the stairs... I am so embarr i still didn't leave my sis room afraid from seeing him... What should do and how i suppose to act when i face him. :(