I've been riding 12 miles every day for almost a month, finally got past the sore butt and now I'm developing numbness in my groin area during my ride. I have a women's bike so I assumed the factory bike seat would be for women in particular. Is this due to me doing something wrong or is that just how it is? To not get sore butt anymore, I adjusted the seat pretty high because I have short legs. Any recommendations?