My little girls 18months she's a very hyper and clever little girl. I've been on my own for nearly a year with her as me and my oartner split but lately she's been such hard work. She has been in a bedtime routine since she was 7 months bed between 7-8 every night. Tonight she's exhausted as she's teethin as am I tired from being up all night. So I out her to bed but past few nights she's had this ear pricing scream. I feel terrible leaving her to cry but I don't want to keep on going into the room. Any advise I feel awful and like I'm failing.