Hi hun, sorry I couldn't read and not post. I'm not sure what is causing your DD to behave the way she does lately, but when my DS was little he used to go thorough many stages of refusing to eat, other times he's wake up more during the night (he's always been a great sleeper) etc, but then he'd come good again. I'm sure she's getting enough food as if she's hungry she'll let you know right? and I think she's too little for teething...so my guess is, it's a stage she's going through (I used to always think it's a growth spurt for my DS!). Hope she comes good for you hun, don't worry they are all over the shop sometimes when they're that small but they do bounce back! And I have heard that b/f babies can go up to 10 days without poo. Sometimes longer
All the best hun!!