My DD has just turned one and he has suddenly become very clingy and only wants me, screams if her Daddy tries to do anything for her. When she goes in her cot for her nap and at bedtime she screams for about 30 seconds then goes to sleep. If she wakes in the night she can get herself back to sleep okay. She doesn't seem to be in pain with teeth or anything. Is it normal for them to be like this at this age?