Baby don’t take breast !

My baby is 2 month old . At the hospital she would not take the breast so we gave bottle , back home for about 2 weeks I always try the breast before the bottle so little by little she learned to take it . But since my breast is not coming much milk , I would always give bottle after giving the breast .. but it has been a week now she totally refuses my breast . Cries until getting purple .. so I just stop and give bottle . The biggest problem is , the bottle is formula milk , not my breast milk .. pumping is coming nothin .. only when she sucks it that it comes . I’m sad .. don’t know what to do :(