How can i stop fanny farting?! HELP PLEASE :(?

It's ruining my self esteem. Me and my boyfriend were having the other day and this big gush of air came out of my vag. I was so embarrased and i couldn't carry on. I went as red as a tomato, i just want it to stop :( Could wearing tampons be the cause of this? And is there any excersies to make it 'tighter'?