My previously placid 3 month old DD has decided for the last week that she needs to have a huge meltdown at bedtime. She's normally up from her evening nap at around 6, has a feed, play for an hour, bath, feed again, cuddle til asleep then put down. However she is usually up 20 mins later, we feed again, nappy change and then she is impossible to put down sometimes for hours, is obviously over-tired and very fussy. Nothing seems to calm her at this point - refuses to feed, spits out her pacifier, patting/bouncing etc don't work. It seems after an hour or hour and a half of intermittent crying she will just pass out from exhaustion and may sleep a few hours. But far worse sleep than recently when she was easily doing a 6 hr stretch with the same routine, now she's waking up a lot more overnight as well.
I just want any pointers on avoiding this meltdown, and whether anyone has experience with cry-in-arms ie. when she's over-tired and refusing boob/paci or any other settling technique, should I just hold her while she has a big cry?
I'll also add we've had minimal luck with self-settling -> definitely can't put her down unless she's asleep, could get away with her waking when she's put in her bassinet if she has a pacifier.
Thanks in advance.