Exchanging WIC formula?

My daughter's pediatrician put Gentleease on my WIC card for our daughter to try because we were unsure if it was reflux she had or a lactose allergy. We took all of the formula off yesterday (7 cans) and our pediatrician told us it's not reflux since she's still gaining weight. It's an allergy. And she wants us to switch to soy right away. Now we have 7 cans we can't use and my card doesn't get reloaded til the 8th. What do I do?