Old folks saying...

My Grandmother told me when I got pregnant with my son (who is two now) that when a young child clings to you more than normally you may very well be pregnant. Back then it was my best friend's daughter who clung to me. Well now my 2 yr old son has been stuck to me for the past two weeks. Only time he's not up under me is when I pry him off of me so he can sleep in his own bed. Has this happened to anyone else?