Hmmm poor bubba girl! hope its not for too much longer, does she seem to be in any pain or discomfort? Have you introduced water yet? and not sure if this would make a difference or not but are her bottles warm or cold? and maybe stop the 2step all together for a little bit than go slowly back to it - it should be fine to last a while before its goes bad - so you wouldn't be wasting it!
Coloxyl drops always worked a treat on Miss B! so did tummy rubs and warm baths!
:hugs: for DD