T.M.
Well, if it comes down to the latter... it will only be a time or two that it happens. She will drink a bottle when she is hungry enough to do so. Babies eat to live, they dont live to eat...
Getting fussy because the breast isnt there is something that will be short lived and she will find the balance as long as you stay calm during the transition.
It will be fine.
Keep encouraging (practicing), you have a few more weeks to go...