There are cysts that will cause your body to believe you are pregnant, thus causing those symptoms. Melimeli had a great point. Try to see a SPECIALIST. A reg. OBGYN doesn't typically stay on top of the newest advances of infertility studies.
you could have polycystic ovary syndrom PCOS... the hormone that makes you lactate can also prevent you from getting pg... you can take meds for that... you should see a reproductive endocrinologist to help you to get pg. if you are trying...
you dont actually start lactating until after you have a baby so i dont know why you would be. have you MISSED a period yet?