My 3 year old has just begun to wake-up at night, inconsolable. This has happened regularly over the past week and it's heartbreaking for my husband and I. Due to speech and language delay (as well as being a toddler) our son is unable to communicate what the problem is. We have tried various forms of comfort but this often leads to more hysterical crying. We are now worried that he could be in pain although he seems fine during the day. Has anyone experienced anything similar and if so, any advice would be greatly appreciated.