It’s not a regression, it’s just always been crap. Delightful happy baby, goes to sleep fairly easily but nights are just awful - still wakes every 1-2 hours all night and wants BFing back to sleep. Very occasionally get the odd stint of 3-4 hours at the start of the night but that’s not a given. If I try to settle her any other way, she screams for a bit, but I usually get her back to sleep, only for her to wake after 10/20/30 minutes again. This repeats until I eventually BF her back to sleep for another hour or two. I’ve mostly been relatively happy just waiting it out, but I’m knackered now and there’s no end in sight.