Any ideas?

My boyfriend and I have been together for 2 years and 2 months and the whole time we have been having unprotected sex. My mom got pregnant really easy, she always says that me and my sister will be like her.. If we were both me and my sister would have a couple kids already and we both don't have any.. Doctors have told me that I have a high cervix, but so does my mom.. I just bought Evening Primrose Oil and Vitex.. I've done research and they both seem really good.. knowing all this from my mom and what the doctors say makes me think there's something wrong with me.. If anyone had any ideas that me and my boyfriend could do I would very much appreciate it!