I can't remember if tonight is night 5 or 6 of Ferber. Nights 1 and 2 were super rough but 3 was great, since that we seem to be regressing. There are tears for a minute or two at bedtime which is ok but he's up again 3 or 4 hours later ever since and super hard to calm down, then again in another few hours. Right now for example, he slept from 830 until 1, it is now 1:36 and he is showing no signs of quieting down. I've changed him and given him tylenol in case it was his teeth and I'm sure he's not hungry! I'm so frustrated, I'm ready to throw in the towel and just start letting him sleep with us again. We don't get good sleep then either but at least he isn't crying!