Hi there...I just wanted to say that I am in the same boat. Our son just turned 12 months and is doing the same thing, although some days I can get him to take 2 short naps. He is a chronic early waker too...today he was up at 4:50 a.m. If I get lucky, the latest he will sleep is about 5:30a.m. Our ds goes to bed around 6 or 6:30p.m. depending on how his naps were and what time he woke up from his p.m. nap. Putting him to bed later seems to result in the same wake up time too. I would also like to get our son on a 1 nap schedule, but with early wakings like that, I am not sure how. Tracy says to fix it doing wake to sleep before trying 1 nap in one of her books, but I have never tried wake to sleep. I am too afraid he is too old to do that....as it is if he sees me in the a.m. he won't go back to sleep, no matter what time it is. Well, I should say if its 4a.m. or later he won't.
I wish I could help more but I don't have any answers either except to ask...is she teething? Is she walking yet or hitting any other major milestones? Could it be separation anxiety? Any other form of physical discomfort? Is something possibly waking her up outside? The advice I have gotten is to try to make it as close to 9a.m. for nap #1 as possible (assuming lo got up at 5a.m.-4 hours A time max) then keep that nap short-45 min or so. Wake your lo up and put back down for nap #2 within 3 hours, then put her to bed early. The bedtime would depend on the length of her p.m. nap...if it was decent...say 1 hour and 15 min or more, then put her down 4 hours later max. If less, maybe do 3 1/2 hours later. If she took a very very short p.m. nap then put her to bed after 3 hours. This could mean her bedtime will be at like 5:30 p.m. I have done this...believe it or not it does not usually result in your lo waking at like 3:30 a.m. or something crazy like that. Worse case scenario she will still get up around 5 or so but at least you will start knocking out the overtired problem. I have done this several times and it works for the most part. You have to let them make up for the overtiredness before fixing the early wakes (my opinion) then once the early wakes are fixed, then try for 1 nap. Personally I have NO IDEA how I will ever get my son on 1 nap. We have struggled with early wakes and OT on and off since he has been born so I tend to think it is just my son's internal clock to some degree. Hang in there. Hope you get some good advice from some more experienced moms.