we also went through this...and no one could give me an explanation
It went on for a while (maybe about 5-6 weeks) and I was getting more and more upset, BUT it DID get better
Then one day, I realised it wasnt happening anymore....DD is now nine months and after swearing I would do "just one more day", we now have an amazing BF relationship, and I cant see us ending it for a while yet. I want to extend our nursing, and I think our little "bump" on the journey, made me appreciate it more
not sure where you are located if any of these will help, but things that helped me were
a very suppportive HV....
Calling the breastfeeding support line (they didnt know either but it was good to talk and get the "cheer" that I needed)
thinking, I will make a decision tomorrow...just one more day (this way, I didnt feel under pressure)
I got DD weighed to see she was gaining weight (but not too often as BF babies dont gain the same way as FF)
you have done FANTASTIC to have BF established, hang in there we are all sending vibes and support