Hi there and welcome to Yorkie Talk
At 5 months, she is still teething so those ears may go up and down during this time. Something you can do to help a little is to keep the weight off...trim the ear hair.
Be careful with taping. I have heard that it can cause more harm than good if not done correctly.
Post some pics when you can....we love us some pics
Hope you join in the community here. This place is filled with so many helpful people and info.