We've been trying to get pregnant, and I'm experiencing some dull cramping and pain. Is this normal?

Maybe, maybe not. This could be normal, but it might not be. The fact that you are concerned enough to bring it up means that you should discuss this with your doctor. This is a good time for a check up anyway: a great time to see your doctor to plan for a healthy pregnancy. There are things to think about and possibly things to do now, before you conceive, that will help you to have a healthier pregnancy. :).