If you feel that she is being overly clingy and has never been this way before then it’s a sure sign that she needs some attention.
It is her way of saying, “Please spend time with me. I am missing you really bad right now and I need to know you love/like/want me too.”
If you point out to her that she is being clingy, instead of just stopping whatever you were doing, then you can forget it. She isn’t going to want to have anything to do with you for long time.