Weird vagainal smell

Today, i had this weird smell in my vagaina i dont know why but it was like a fart everytime I open my legs, and today when I got off the bus someone said it smell weird, idk if they notice it was me. Do you think they did? I was around many girls on the bus so i dont know, but they kept blaming one another but not me i dont know why i have that smell then we i got home i had white discarage but it smell weird what can it be?