As far as I remember (this was about four years ago) it took about three days before we realised there were no new sores appearing, and the old ones were drying out.
Bear with it, I really think there's no option but AB's, especially with such a little one. Rubbish for you though, you must be running around like the proverbial blue-bottomed fly.
For us, we just tried to control it from spreading to us, or her sister, and kept surfaces, including her cot, regularly cleaned. Restrict her toys a little, too, I'm not sure about transmisability (? sp ?) but we didn't want to risk it.
The AB's definitely worked for us though, and we'd struggled on for days with Hibiscrub and anointing the sores with Fucidin (fucidic acid - I think you can get it from your pharmacist if you're registered for the pharmacy advice service - we actually kept using it alongside the ab's as a belt & braces approach) - it cleared up very quickly really.
Grit your teeth, it'll be gone before you know it. Poor wee soul, I hope she's not to sore with it in her mouth too.xx