after only getting 4hrs sleep the previous night on the suggestion of our health visitor we have started sleep training with our 8.5mth DS. Before we used to rock him and feed him to sleep but he was constantly waking in the night and couldn't settle himself. Tonight was our first attempt and he screamed himself hoarse complete with hyperventilating I stay in the room with him and talk soothingly but it's breaking my heart. How long did it take for your baby to settle themselves with sleep training??