Plus size mommas - baby wearing?

So my friend lent me an ergo baby carrier for my little one. I went to put it on and no way no how was I getting that thing on with a baby in it. The waist strap alone was a let out as it could be. I'm a size 18 pants, but I am a 40I bra size. Does anyone know of a more forgiving baby carrier? In getting migraines from the combo of bra straps and carrying her butt everywhere!