help!! best tips to try and get pregnant?

My fiancé and I have actively been trying to get pregnant for a little over 6 months. I track my fertility window on two different apps and make sure we get it on especially during those times (but we are having unprotected sex 1-2 times a day, 5-6 days a week). We are both smokers (he more than I) and I am a little overweight, and I know those things affect fertility. But my family has a history of not only getting pregnant, a lot, but easily. And his side seems pretty average to me. 

I've read so many different things about holding my hips up after sex for 30 minutes to soak it in, take prenatals, etc. but I was wondering if anyone on here had some advice? 

Sincerely, the girl who has always wanted to be a mom and is getting impatient and worried. ❤