Still not pregnant???????????????????

My boyfriend and I are trying for our first baby together. Yes I said boyfriend. We've been trying for 6 months now and we've been unsuccessful in the conception department. Lately he has come inside me when I am ovulating but each time, I get my period two weeks later. I am getting tired of waiting to get pregnant and have a baby with him. We used an ovulation monitor and to see when we ovulate and we had sex on them days but two weeks later, like I said, I have my period. We have sex 3 times a weeks and when I am ovulating we have sex on the days I am fertile and ovulation day. Now I am getting upset to why we aren't getting pregnant when we've been trying to get pregnant since January. We are really in love with each other and we decided to move in together so that we could try on our own to have a baby together in the privacy of our own home instead of in my parent's home where we were once living. What is going on because I am still not pregnant???