Help!!!!!!

Me and my boyfriend for 8 years decided to try for our last child (3rd) i recently got off birth control (implanon) after having it for 3 years we been tying since May and still nothing is happening I'm starting to feel like i can't have kids anymore n i am very upset... Did anyone have this problem after getting off of birth control???? My obgyn told me everything will be back to normal and i can get pregnant in no time!!!!