'Stop trying to conceive'....

Amanda 💗 • With my husband for 18.5 years ❤️ Married 6/27/08 💍 I`m a Postpartum Nurse 💉 Addison Sarah born 1/1/16 🎀 Ready for Baby #2
I know people keep saying to 'stop trying' and it'll happen, but my problem is if we stop trying, it won't happen...bc DH and I have only been having sex during my fertile time, when I say we should. Otherwise we don't for the whole rest of the month. 
I've never been a big fan of sex. Endometriosis always made it painful and I never learned to enjoy it. Now especially it has become a chore. If we stop trying, I don't know when it'll happen, so I guess we won't just stop...