I don't know why, but I do know how it feels it is so very exhausting

My DD has just gone through very similar for just over a month, and has just started sleeping through it again, we just had to go with it, DH and I took turns, and just one night all of a sudden she stopped again. I think maybe she's just processing so much stuff that it's a bit overwhelming? I really don't know, but I hope it passes for you soon.