DON'T keep trying with THAT saddle. Bikes come with a standard man's saddle, and even if your bike is women's specific the manufacturers have not yet followed this concept through to the saddle. Ask the shop to measure your sit bones... Anywhere that sell Bontraguer or Specialized saddles can do this. They will sit you on a pad which will show dents where your pointy bits at the bottom of your pelvis are. Those are your sit bones and they will give you the right size saddle so that you are sitting on them. I do this with all new bikes and it is the difference between heaven and hell.