I just had for the first time and freaked out!!! What happened or what is she?

So I am 15 and just had for the first time and everything was going great until I head a viberation on my with a farting sound. I freaked out and her eyes got huge and everything went in slow motion and I ran out of the room and went home. I feel tramatized right now and dont know what to think! She is probably pissed and I dont know if I could look at her to tell her im sorry for whatever that was. I thought you only fart out your ... Please no one make fun of me because I dont know what happened thats why im asking...