TTC nexplnon

any ladies?? I been TTC for 8 months and been off nexplnon 8 months but nothing !! and my period comes,every 2 and half months now but before b control I had a normal every month periods I just feel like giving up! with the whole,baby thang every one else,is,getting pregnant and here I am trying but nothing and my periods comes every 2 months and I ovulated last week and 2 weeks before that but didn't have a period so I'm so confused ???? I even took a ovulation kik test and it said I was ouvlating both times have any ladies been on,nexplnon and experience this??