There are a couple of reasons you may be struggling with this and what ny biker said about it not sounding like a good fit since he didn't actually watch you on the bike is true.

1) It may just be the saddle and the back portion of the saddle may be angled too much downward for you, so you feel the need to compensate by tipping the nose up. If the nose goes up too much, you will start having issues around your pubic bone so it's not the best solution. What you might like to do is try a flatter profile saddle. Or, you could even take the saddle off of your hybrid and put it on your road bike just to see what kind of difference it makes. It is really unusual for people to be happy (especially women) with the stock saddle that comes with the bike.

2) There may be a problem with your reach to the handle bars. You might be reaching too far. So you may want to try to move the saddle forward slightly. Having said that, if reach is the problem, you need a proper fit because the right answer for you may be to move the handlebars closer to you as opposed to moving the saddle.

When your saddle position and fit is right, you should be able to ride while "piano playing" on your handlebars, what I mean by this is that your finger tips are on the handle bars and your taping them like your playing a piano. If you can't do that, something is wrong.