Baby not sleeping

My almost 13 month old is going through it! We just finished leap 8… we’ve been battling night wakings and separation anxiety for the last two weeks.. I’ve tried everything, dropping to 1 nap, snuggles, CIO, Shes not responding to anything. I’m not sure if this is just a wait it out kind of thing, but it’s starting to wear on me… what happened to my sleep trained babe?! We went from 12 hour sleeps to multiple wakings a night and early wakes from naps.. is anyone else going through this?