getting pregnant is actually hard.

Hello ladies, as seen on the tittle, it is getting pretty difficult to get pregnant. I'm a plus size girl with a plus size man and we are trying to start our family. (I had to mention mine and my mans body type to give a visual and obvi it's helpful to understand bec it plays a factor). In the beginning nothing seemed like a rush. We would do our thing no problems, if we come pregnant it was no worrie. But now we have a house, we have our dogs, we have our jobs, we have all together bt we are just feeling empty. We need that "family" you know? We are HAPPY! Don't get me wrong I love him, us, and just beyond blessed with what I have. I just need help trying to convince. I have changed my diet and started exercising maybe that would help, bt nothing yet. I have tried taking prenatal bills. Stopped my bf from smoking (weed bec that can lower sperm count). Even doing it on my ovulating days. And still nothing. What else should I try? Or do? Any suggestions?