I think I was right around 21-22 weeks when I first started feeling real kicks although there is such a range depending on your weight, the size and even temperament of your baby. Not to mention you may not be as far along as the doctor has predicted because due dates really are kind of rough estimates. If you have any concerns you can ask your doctor.
Here is a GREAT website! If you sign up for their newsletter, they will ask for your due date and send you an email with all the things to expect, renderings of what the baby looks like, etc.
http://www.babycenter.com/6_your-pregnancy-22-weeks_1111.bc
http://www.babycenter.com/0_fetal-movement-feeling-your-baby-kick_2872 .bc
Congrats!

