Hi!
So no professional has any helpful possible explanation or can advise me on what to do 

Baby girl is exclusively BF. At 7 weeks she started to be really cranky and clingy. Also fussy with her feeds, she then didn't poo for 10 days 

I had read about the 8 week wonder and put it all down to this.
We took her to a&e, where they gave her a depository, after 5 hours she finally let it all out!
Due to wanting to feed less she had lost a little bit of weight (sorry I can't remember off the top of my head how much exactly!).
So 4 days later still no sign of any poo and still near enough refusing the boob! She probably has only 3 good feeds a day
Tried different positions and she does latch on good, has a little sick then pulls off crying.
So worried about her!
I've been reading on forums about they can be fussy and refuse, no one has any advice tho :(
Any advice?!