Hi Beatrice,
Part of the problem may be that people can't find you. Use all your descriptive tags for each item. The descriptions for your items and also the shop information under the banner is where Google picks up on keywords. With Etsy search, titles and tags are more important. I'm not terribly good at describing these methods, but this guy is:
http://marketmyshop.blogspot.com/Search the blog using the list of labels to the right, and posts you might find helpful may be labeled SEO or search engine optimization and and also posts about tags or tagging.. I haven't incorporated everything he recommends, but have found much helpful info there.
I'd also recommend filling out your policies section so new customers know what to expect from you i.e. when you ship, your return policiy, etc.
If you have a facebook fan page set up for your pottery, link it to your shop. If not, think about setting one up. You can find suggestions about that in the above blog as well.
Be patient too. It takes time and attention. Good luck!
