Ha, Ms. Florra, you got a tough road ahead of you !
With Yorkies, Collars are for...
Fleas, Bells, or Shot/ID Tags, and that's IT !
Yorkies have rather sensitive throats, and problems can be
aggravated when using a Collar for restraint or training.
Isn't that GREAT, that she reacted like that, to you tugging
on her Harness !!! Her reaction (when you got home) told you
she definitely understood she'd done something wrong !
Problem was, that you didn't follow through, and when she retreated
or relaxed the tension on the leash, you MUST praise her, right THEN !
These frequent Tugs with Praises, focus her attention, and still can
relax her, knowing she eventually did the right thing.
Make sure when you get home, to hold, Pet and soothe her, telling her
what a great job she did. (actual fulfillment of that will come later
go ahead and lie to her for the time being
)