I know it is hard - but you have to stop. She doesn't really need a diaper, does she? She won't go to sleep and always wake up because you are coming - not because she really needs you. Babies that age recognize pattern! So she fuzzes and she knows you are coming. It is going to be rough for a few days because she will get louder and fuzzes more but than she realizes, it doesn't make a different. If you can't stand the crying/fuzzing go in the room and put your hand on her back/belly - don't talk, don't pick her up, she'll settles down and goes back to sleep. She is in an age where she has to learn to "comfort herself", put herself back asleep. With my older one I did the mistake to pick her up and "pamper" her whenever she woke up at night - she wakes up at night and comes in our bed now, because that is what she is "used" to.
A little about me: I am the mother of a 3 year old and 2 year old triplets..... happily married for 7 years and a stay-a-home Mom!