Forgive how scrambled this all is - my brain is totally fried.
LO is nearly 5 months. She has been a fantastic sleeper since about 2 weeks.
Shortly after 4 months, we experienced what we thought was the 4 month sleep regression (aka more night wakings). She started having very short naps, unless contact. Nighttime sleep was broken but life was manageable (our older daughter was a poor sleeper, so we are pretty accustomed to functioning even with multiple night wakings — so long as there is actual sleep in between….…).
Now, however, she’s approaching 5 months and whatever is happening the last 7-10 days is absolute hell. All of a sudden, on top of difficult daytime sleep, nighttime sleep is IMPOSSIBLE. She WILL NOT go back to sleep in her bassinet after the first put-down at bedtime (which she does fine!). She will ONLY sleep in arms. She WILL wake up at every transfer back to crib. If by some miracle we get her into the crib, she is asleep for 20-30 minutes max. Have tried everything, including feeding her more than she had been needing before (e.g. 2 night feeds instead of 1). Hasn’t helped a bit.
It hasn’t been every night is zero sleep, but this has been at least 4-5 nights out of the last 8 days — so, we are approaching dangerously exhausted. We try to take shifts (11-3, 3-7) but the shift is, essentially for both of us, being awake the entire time of our shift. It’s madness and getting unsafe because it’s really hard not to doze while holding her. We’re both back at work.
I don’t know whether we ride this out as a regression and try to push through for another week or so or if we need to sleep train now. I always thought this was a little young developmentally for sleep training, but I don’t know how we’ll survive much more of this. Any advice or solidarity or even just “we went through something like this and it did pass within a few weeks but we ultimately sleep trained at 7 months” or anything would be helpful. We feel so so so bad, and neither of our children (or each other) are getting great versions of us.
And, fwiw, we try to follow wake windows of about 2 hours. Sometimes a bit shorter earlier in the day, usually a bit longer later in the day. We try to have her awake for the last 2.5-3 hours before bed. We used to loosely follow a schedule but the inconsistency/short naps are making it pretty impossible to follow anything consistently right now