Nipple diameter too small for breast shield

Shelby • TTC #2 since February 2016
When I finally got around to looking at my Medela Pump in Style breast pump I found out that I have a very small nipple diameter of 11 mm. The smallest breast shields they make are 19 mm diameter for breast diameter 15-17. I emailed the company and they could not help. Has anyone ever had this problem?  Will the 19 mm shield work for me?