My baby 11 months old now, from the beginning when he was using saree cradle he used to hold the saree in one hand and suck his thumb by 5th month, saree changed he couldn't catch the saree he used to cry and will not sleep so I gave a purple and yellow color towel so he started holding the towel and suck his thumb to sleep. The problem is we removed the saree cradle, he's sleeping on bed even then he wants that towel to hold and wants to suck his thumb to sleep.. without that it's very hard to make him sleep, if we give that he'll sleep in 10 minutes, why he's doing so.. can it be continued or sign of someother issues, he didn't start saying words yet, trying to walk, other than this all fine.. please help me out