Oh dear! This is not good. Could he maybe need more time with you? Are you playing with him as much as you used to? Is he missing playmates from your old house? I'm trying to help you think of reasons he might be acting this way.
Hmmm! Thor you'd better straighten up or we are going to report you to the Yorkie Police!
Stop stressing out your adoring mama or she won't adore you any more.