Have you been to a doctor to rule out why some reasons could be that you haven't been able to conceive? I know that my husband and I had been trying to conceive for about 8 months and then I started taking prenatal vitamins and conceived 1-2 months later. So if you haven't tried that, you might want to try that. I'm not saying it will help 100% but it's worth a shot, plus the vitamins do wonders for your hair and skin.
Well thanks for advice, soon I will visit doctor.