Oh big hugs hon. I think you've probably read around the boards about the issues I had with DD2 and sleep? Basically it went from great to POO at 5 months and continued for 3.5 months! Some nights I lost count how many times I was up but I knew that often I was up with her more than I was asleep. It was awful so I totally feel your pain.

Try a baby chiro, I think that helped DD2 a lot. And if you're comfortable with it, maybe consider putting her in her own room. I really wasn't that keen on moving DD2 out of our room but I honestly think it helped. I know SIDS say to keep them close for up to a year but I felt safe moving her with our Angelcare sound and movement monitor plugged in. And knowing DD1 had been fine when we moved her at just 10 weeks helped too.

They are the only things I can think of that definitely helped. I hope you get a decent night soon x