Please help, I love my kitten but all of a sudden she is farting so much?

the smell is so bad, it's like somebody let off a stink bomb in the house, I mean it's so bad that i'm getting angry...i'm literally gagging, I've been feeding her friskes the wet food, but I think I may have bought a different box ( I don't think so, because I buy them in bulk) and she does p gas, when she gets nervous, but this has started lately like no other, I've literally had to put her in another room it's a huge walk in closet at night with all of her treats,bed, food and water etc....because I just can't take it ....what the heck can it be??