Question yeast infection

So I have a bad yeast infection and I am on vacation in another country. I have to look for monistat but my dr told me to use 7 day treatment for it but the problem is I will be on a plane on the 5th night of treatment. What do i do if I cannot bring it on my carry on and how do I even apply monistat on a plane. Am I allowed to miss one or take it during day hrs before my flight?