My 8 month old has started to rock back and forth at bedtime and cries hysterically. We put her on her back and she instantly rolls over onto all fours, rocks and cries. She is a confident crawler, pulls herself up and is trying to walk so I know there are new skills. Naps aren't as bad but the night times are awful. We did sleep training at 6 months but that's gone out the window. Does anyone have any experience with this or tips on how to stop it?