I've been off birth control, the implanon implant in my arm since the end of may and have only had one period the end of June. But as of two weeks ago I was not pregnant. Wondering why? Really want to get pregnant but I'm not having a period so that means I'm not ovulating. I was keeping track of my ovulation and I last ovulated July 13 and no period, nothing since then. But I'm not pregnant.