Welocme to YT!
Your baby is a like anewborn and it takes a while just like with human babies for them to develop bladder control. She sounds little too which means her bladderis tiny and fills up fast so be patient with her. It usually takes at least a year for a yorkie to be fully potty trained. But just be glad she is a tiny yorkie and not a bigger dog!! LOL...That is what I always remind myself.