Not sure if I actually want to hear the answer to this tbh :) The 4m one almost killed me!
DD has had a cold but recovering. She's gone from 3 wake a night to no naps and waking every hour (again) We're already co-sleeping and plans to move to own room are well and truly out the window for now.
Please tell me this is a cold or that a regression isn't as bad at the 4m one