Hi there everyone, My DD is 10 weeks old and i ...

Hi there everyone, My DD is 10 weeks old and i am currently expressing and feeding her with a bottle. However, i have recently noticed that i am not expressing as much and am having to alternate between a formula feed then a breast milk feed. i express at every feed (even the awful night time ones). Any tips on how to increase my supply? Or do you think her days on breast milk are coming to an end??