My four month old has had a week of really atrocious sleep - often waking as soon as we put her down in the crib, so we are having to let her sleep in our arms and take turns sleeping. We haven't had to do this since the first week of her life - we've had problems with frequent wakings at times, but she would at least go down in the crib in between. We're exhausted!
Wondering if this is the four month sleep regression or just the effects of a nasty cold, combined with her vaccinations a week ago? Obviously, I'd prefer the latter, since that would mean it would pass fairly soon.
Anyone experienced this? Can the sleep regression really make them regress this much? It doesn't seem to quite fit with the thing about not transitioning from one sleep cycle to the next, as she isn't even completing a sleep cycle, but waking as soon as she's put down.
I'm trying to avoid co-sleeping as I am kind of paranoid about a stickler for the SIDS prevention guidance.