I have posted a lot the last couple of days because I am so exhausted physically and emotionally. My 4 month old DD will not sleep. She cries and cries and cries in my arms or DH's. DH is also at his wits end. He says he wants to let her cry it out. I refuse. He says what is the difference between her crying in our arms or crying it out in her crib. Does anyone have specific research that shows the difference. He says he won't help me anymore if she is just going to cry anyway. I have an appointment with her Pedi tomorrow to discuss possibly getting her on something else for her GERD. We have tried absolutely everything to get her to sleep. I feel like I literally can't do it anymore.