Helping my toddler sleep

Jennifer

Alright mommas. My 18 month old has started waking up at night just crying his little heart out. He wakes up almost every 1 1/2 hours and nothing calms him down. It doesn't matter what time he goes to bed or how tired he is. He sleeps the same regardless. It's starting to exhaust me! And I don't know what to do, has this happened to any of you guys before? If so what worked to help?