Separation Anxiety/Leap/Sleep Regression

My 8 month old previously awesome sleeper has officially turned into a nightmare to put down and keep asleep! She’s in the middle of a leap, and we think that due to her new understanding of object permanence, this may be a separation anxiety thing as well.

Is anyone else going through this (or has anyone else gone through it)? Any tips/suggestions?

She used to sleep through the night (1 feed) and go down like an angel for naps. Now EVERYTHING is a huge struggle.