Please no judging me..

So my fiance and I are getting married in 4 months we are hoping to possibly have a honeymoon baby lol it's also his birthday... so we have been having unprotected sex for the whole two years we have been together and still no baby.... so I am even questioning if I am even able to have kids... 😕 so what are some good positions or lubes etc that I can do to hopefully get pregnant?