Hi Emily, I understand your frustation. I had same feeling when I opened my store. I had run promotion but not many sales as my expectation.
I joined the forum, see what's other store opinion, some of them say it will take sometime to establish the store.
I am still struggling to sell my stuff, but I won't give up. I try to create different style, different items, learn from the pro, change the picture and so on. Try and try. I don't run promotion anymore, but may be later.
These way make me feel comfortable , but keep trying to get my goal.
All the best ,
Dia