Been off BC for 18 months

Michelle • Hi I`m Michelle I`m 23 and have been off BC for 2 years now and still nothing yet!
I have been off BC for 18 months. I have regular periods. I have sex all at the right times! My husband has a daughter already so we know it works on his end. And I have had some test done also and was told everything looks good! I have also had a false positive back in December of 2013!!! That was one of the worst feelings anyone should ever have to feel! Please help me out and tell me some of your tricks to getting pregnant! I try not to think about at all but it's hard when you have friends on Facebook that are saying they are pregnant or posting pictures and all! So help me out what helped you get pregnant??