As others have already mentioned...it could be a saddle issue, too. Does your saddle have a "cut-out" down the center? Some women (myself included) find that a cut-out is imperative to their comfort...and then there are some women who don't need a cut-out. I know for sure, that I definitely require a cut-out in my saddles. In my case, it helps take pressure off those tender lady bits. And also...be wary of "gel" saddles. Often, gel saddles end up causing the very thing we are trying to avoid...unevenly distributed pressure on our sit bones and girly parts.
2012 Seven Axiom SL - Specialized Ruby SL 155