My dd(2.4) has never been a good sleeper but we had a period of a couple of months when she wasn't too bad around the time she turned 2. I had done controlled crying as described in Toddler Taming (going in after 5, 7, 9, etc mintues) prior to her sleep improving. However, she now appears completely resistant to controlled crying and will be up for hours in the middle of the night. I also have a 20 week old dd who is waking every 45 minutes and a dh who works away so I am getting pretty desperate. She is not awful every night but she never sleeps through and when she does wake she can be up solidly between 2 and 5am. She gets up and comes to her door and howls but can't say what is wrong. She has a stairgate across her door and I never let her out of her room. I just return her to bed after asking what is wrong. I then keep returning her without saying anything.
I don't know whether I should be returning her to bed as soon is she gets up (which is straight after I have put her back) or whether it should be more of a controlled crying approach with increasing intervals. Can anyone advise?
Sorry if this doesn't make much sense - am totally exhausted 