How well I remember the days of watching every minute!! It would be wise to get her checked out just in case of course but I also wondered at one point if there was something wrong with Gizzie (she's now 10 months) but now I think it's because she is the smallest yorkie I've had and consequently her bladder is tiny and can't hold much! (Maybe I'm wrong!).
I just used to grab Gizzie (and Gypsy Rose before her!!) when I saw her starting to squat and just make a disapproving sound and put her out in the garden where she would hopefully continue....!! I never told her off as such.. maybe your little one is getting a bit over-anxious about it all? (I don't mean because you are shouting at her or anything like that! - some are very sensitive... little Gizzie is and I have to watch how I express my disapproval LOL).
Your baby is young yet and they do say that yorkies are hard to train but I have never agreed with that. I know it's hard but just carry on.. you think the time is never going to come but all of a sudden she'll get the message and you'll be so proud of her and she'll be so proud too!!
Ana xx