Sorry to just barge in here on the thread, but I need some advice from moms who have successfully let their kiddos CIO.
My baby girl is 18 weeks old. She was a wonderful sleeper from about 4 weeks until 14 weeks. At 10 weeks she started sleeping 10 hours straight in the night and napped 5 hours a day with at least one two-hour nap. This continued until 14 weeks when *she* gave up her routine of swaddling, bouncing and shushing. Without swaddling, the bouncing and shushing no longer worked. Her sleep slowly got worse and worse and putting her down became harder and harder. At the height of her non-sleeping days, she was napping only 45 minutes a day and waking up 4 times a night, each time being a major production.
Friday night, she slept a full 10 hours again. Her naps were still super short, only 35 minutes, but with the return of her nighttime sleep, I thought we'd be able to get back on track. For the next few days, she went back to waking up once a night to nurse, but in turn slept about an hour longer, so I wasn't concerned. Her naps also got a little bit better. I was placing her in her crib awake and staying with her until she fell asleep. I'd put her on her side, because that was the only way I could get her to take her thumb/fingers, let her hold her lovey, and shush her until she calmed down or fell asleep.
Last night she woke up at 1 a.m. after being asleep for only 5 hours.

I nursed her (she ate a full meal...) Naturally she woke up again at 5 a.m. It took until 5:30 to get her back to sleep and then she only slept until 5:50 a.m. That's when we let her CIO. My dr. had suggested that I go in every 10 minutes to reassure her, but I just thought that would rile her up. I knew she wasn't hungry (I tried to feed her at 5) and that she was essentially OK. It took her 35 minutes and then she slept for another hour and 15 minutes.
So my question is now what? I don't want to waste last night's CIO. I don't exactly want to go through it again, it was anything but pleasant, but bottom line is I need her to sleep well for her sake. She's not the same baby that she was. So do I let her CIO for everything now? Or do I only do it at night if she wakes up and continue my other routine for naps and hope that she makes the transition on her own? I have HHHC and I know he says to start with the morning nap, but that of course didn't happen for us.
Any thoughts or suggestions would be appreciated. TIA