My daughter is 11 months and I am at my wits' end. She used to sleep with the boob but lately she has been biting me A LOT and still not going to sleep. doesn't want to be rocked, doesn't want to be sung to. So I just her put her in her cot and walked out. It's been nearly half an hour and still hysterically screaming. Feel on the brink of tears myself. am I a monster for doing this?