Hi, Leanne! You'll need to feed your starter again and wait for it to double in volume, which might take more than one feeding. As a general rule, if you plan to bake in the next two days, you're better off not putting your starter in the fridge, but keeping it out on the counter, since you often need to give it 2 to 3 feedings, 12 hours apart, before your starter is ready to bake with. 

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