Past sexual abuse is a likely reason. I never had the "O" with my ex-husband, and I got pregnant twice. It's a very hard thing for alot of woman to achieve orgasm with a man. I've heard that masturbation alone or with a partner, using a vibrator with a partner or alone, and position changes can help. But also, many medications are known to have effect. I am willing to bet that past sexual abuse is a certain factor. You are getting counseling for it?

Getting pregnant isn't as easy as one might think, but the practice can feel good! Medications, diet and nutrition, weight, health problems, physical and mental stresses, all are possible things. Make sure that you take a multivitamin-mineral, eat healthy, be healthy. Not to gross anyone, but watch how your mucus changes during your cycle. Be ready to jump in bed when it's thin and stringy like egg-white. You can buy ovulation predictor tests also. Do try to relax, though. A potential baby isn't going to be made if you are too stressed. You *can* become too stressed about not getting pregnant! Don't get your hopes up each month only to be saddened when it doesn't happen. That will actually decrease your odds of getting pregnant. Do keep track of cycle days, maybe even like a diary you could sort of chart CM (cervical mucus) consistency (thick, color, thin, etc), any other things like when you have sex. Be sure to give the guy a break every other day so he can build up his supply of reinforcements.

Hope this helps!