I can't do this anymore.

My almost 6 month old is sleep trained, and was able to fall asleep independently after being hit hard by the 4 month regression with 2-3 night wakes for feeds (EBF). Last week we went on a trip, no time change but of course different environment etc and her sleep became terrible, we couldn't let her self settle as there were lots of family with us and we felt the pressure to see her to her. On top of that, she became unwell and caught a cold so is not sleeping unless held by either me or my husband. This is the 3rd night of this and both me and my husband are exhausted due to minimal sleep, the moment we put her down in the crib, she is awake. We thought being home might have helped. As she is unwell, we want to offer comfort but holding her all night is not sustainable. I tried to bring her into the bed with me, she is not interested.

Tonight we thought we'd take shifts but I myself am now unwell and feel so exhausted and groggy.

We want to do CIO but are waiting until she is better, but I'm struggling to cope. The sleep deprivation is real and I can't be my best self during the day.

Please share similar experiences or solidarity because it's currently 2.39am where I am and I am losing my mind.

Should we wait to do CIO again once she's better? Will she remember how to self settle? Will it be easier than the first time?