All today and night before i couldnt stop farting and then i had a bout of very runny diahorea never happend before?

Upset bowels: Probably something you ate. If it doesn't go away or increases in frequency, duration, or severity then i suggest seeking medical attention.

Irritated bowels.: Probably something you ate causing excessive gas formation followed by diarrhea. Next few days watch your diet, avoid dairy products, orange juice, green salads, beans, fatty and fried foods. You can have soups, jello, bread. You can also use probiotics.