pregnancy

okay so i’m 18 and me and my fiancé have been trying for a baby. we haven’t had any luck at all. i took birth control (the pill) for a year and a half. i’ve been off of it for almost 4 months. i feel like that could be part of it but i honestly don’t know. we really want a baby but every time i take a test all i see is negative. i had one false positive and it’s just broke my heart. anyone would like to recommend tips or advice. please do. i’m lost at this point.