Your saddle is probably too high and too far forward. Can you rotate the crank with your heels on the pedals or do they come off at the bottom? Rotate your pelvis forward so weight is evenly distributed between the ischial tuberosities and ramus. Set your cleats all the way back if you can adjust them. What's your saddle nose-to-center-of-bottom-bracket measurement? Saddle setback should be somewhere in the neighborhood of 70-90mm. As you lower the saddle it requires increased setback by a corresponding amount. Pressure on your perineum indicates you need more saddle tilt and/or a lower saddle.