Our 9mth DS has suddenly started to wake up at 4.30am. We think that it's due to his sudden activity spurts in the day of walking, crawling, climbing and standing. He seems to have developed all these almost overnight and we have ruled out everything else. We are going in to check him every 20mins at the moment but this always makes him much worse. He can be crying before we check him but is hysterical after we've been in. I know that he needs the initial reassurance that we are here but it seems to be actually prolonging the crying. Should we leave him for longer periods before checking him or keep going with the 20mins? How do you cope with the guilt? Does anyone else have a baby who freaks with the checking or is it just our DS?