I have a12 month old who recently has been really horrible to put to bed mainly at night. She used to be really good and just roll straight over and go to sleep and still occassionly will if she is really tired. Just recently when i put her to bed ( as she is ready displaying signs of being tired) she immediatley starts crying then ends up screaming this will last for a min or two then shell go quiet for another min or two then start again and this will go on for about 20 mins untill she crys herself to sleep. We have tryed going into her after a few minutes but this just makes her worse and she thinks we will get her up but then we walk away and bingo we are back at square one. Is this ok to allow her to do this for that long? its the only thing that works. If not please tell me what i can do pulling my hair out over this at the moment. Just want her to go to sleep without crying like she use to.