I feel so stressed over my BF journey already. My daughter is 3 weeks, and has fed relatively well until now, gaining weight okay and was back at her birth weight by 2 weeks old. She’s now started being ridiculous fussy at the breast, thrashing around and unlatching in frustration. This can go on for hours, usually in the evening so I end up giving her a bottle of expressed milk which she takes fine and falls asleep.
This week I’ve noticed that my breast don’t feel engorged when she’s due a feed or in the night like they used to. Now they are soft and feel empty (I know that’s not how it works) but DD doesn’t seem to like a soft breast.
Im worried I have a supply issue but how do I know? I also think I have a fast let down. I can’t work out what the problem is to be able to fix it. She’s been feeding ok all day until 5pm and the fussiness has started, I feel so frustrated 
Has anyone got any advice?