I have 17 month old twon girls. One of them has been so incredibly cranky lately. She whines most of the day. Nothing has changed too much in her routine. I thought maybe it was her back teeth bothering her. I give her teething rings, i tried a frozen washcloth (she didnt want it), and sometimes give her tylenol, but the whining continues. She has also been waking up several times a night when she sleeping through the night. Any suggestions? Or does anyone know why this is going on? Thanks.